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Öğe A kind of energy storage technology: Metal organic frameworks(2012) Öztürk, Zeynel; Köse, Dursun Ali; Asan, Abdurrahman; Öztürk, BanuAbstract- For last fifteen years energy has been transferred by using electricity. As an energy carrier electricity has some disadvantages like its wire need for transportation and its being non-storable for large amounts. To store more energy safely and to transport it easily, new storing medias and devices are needed. Metal hydrides, carbon nanotubes, metal organic frameworks (MOFs), compressed gas hydrogen and liquid hydrogen systems are being investigated to store and transport hydrogen safely and easily. To use hydrogen as renewable and sustainable energy source on board for transportation and many mobile applications economically and efficiently, USA Department Of Energy (DOE) had set targets for 2010 and 2015. System gravimetric and volumetric density should be 5.5 % wt and 40 g/L respectively according to DOE. To meet the DOE 2015 targets a novel organometallic valin-Cu(II) complex studied. After metal organic framework structured valin-Cu(II) complex synthesis, it is characterized by elemental analysis, X-Ray, FT-IR and thermo analytic TG-DTG techniques. And then hydrogen storage capacity of complex is determined by HPVA-100 adsorption analyser.Öğe A validated RP-LC method for salmeterol and fluticasone in their binary mixtures and their stress degradation behavior under ICH-recommended stress conditions(Maik Nauka Publishing / Springer SBM, 2014) Akmeşe, Bediha; Şanlı, Senem; Şanlı, Nurullah; Asan, AbdurrahmanSimple, accurate, precise and fully validated analytical methods for the simultaneous determination of salmeterol xinafoate and fluticasone propionate in combined dosage forms have been developed. These drugs were exposed to thermal, photolytic, hydrolytic and oxidative stress conditions, and the stressed samples were detected by the proposed method. Additionally, pK a values of three ionizable drugs (salmeterol xinafoate, fluticasone propionate and thioridazine) were determined using by the dependence of the retention factor on pH of the mobile phase. The effect of the mobile phase composition on the ionization constant was studied by measuring the pK a in different acetonitrile-water mixtures, ranging between 50 and 65% (v/v) using LC-UV method. © 2014 Pleiades Publishing, Ltd.Öğe Bazı metal organik kafes yapılı bileşiklerin hidrojen depolama performanslarının incelenmesi(2013) Öztürk, Zeynel; Köse, Dursun Ali; Öztürk, Banu; Asan, AbdurrahmanHidrojenin bilinen depolama sistemlerinden farklı olarak depolama ortamlarında kimyasal olarak veya zayıf van der Waals etkileşimleriyle fiziksel olarak tutunabildiği bilinmektedir. Hidrojen, fiziksel adsorpsiyonla karbon nanotüplerde, zeolitlerde veya bunlardan çok daha yüksek yüzey alanına sahip Metal Organik Kafes (Metal Organic Framework; MOF)’lerde depolanabilmektedir. Bu çalışmada, hidrojen enerjisi depolama sistemi zayıf yönünün iyileştirilmesi için karışık ligandlıorganometalik trans-Diaquabis (nikotinamid-?N)bis(salisilato?O)kobalt(II), trans-Diaquabis (3 hidroksibenzoato-?O1 )bis(nikotinamid-?N1 ) bakır(II), (p-brombenzoato) bis(N,N-dietilnikotinamid) kobalt(II) kompleksleri (sırasıyla A1, A2, A3) sentezlenmiş, TG, FT-IR, X-Ray ve Elementel analizlerle karakterize edilmiş, adsorpsiyon analiziyle hidrojen depolama performansları belirlenmiştir. Sentezlenen komplekslerin (A1, A2, A3) 90 bar basınç ve 77°K sıcaklıkta yapılan ölçümler sonucu hidrojen depolama miktarları sırasıyla kütlece % 2,59, %2,63 ve %3,22 oldukları belirlenmiştir.Öğe Bazı yeni imin bileşiklerinin eldesi, spektroskopik özelliklerinin belirlenmesi ve inhibitör özelliklerinin incelenmesi(Hitit Üniversitesi Fen Bilimleri Enstitüsü, 2014) Sılku, Pakize; Asan, Abdurrahman; Özkınalı, SevilBu çalışmada başlangıç maddesi olarak p-hidroksibenzaldehit ve anilin, p-kloranilin, p-nitro anilin, p-metilanilin ve p-aminobenzoik asit kullanılarak Schiff bazları ve bunların akriloil türevleri elde edilmiştir. Birinci basamakta anilin türevleri ile phidroksibenzaldehitin etkileştirilmesi sonucu Schiff bazları, ikinci basamakta ise elde edilen bileşiklerin inert atmosferde önce metalik sodyum ve daha sonra akriloil klorür ile etkileştirilmesi sonucu schiff bazlarının akriloil türevleri elde edilmiştir. Sentezlenen bileşiklerin yapıları, elementel analiz ve IR, UV-VIS, 1H-NMR,13C-NMR ve kütle spektroskopik yöntemleri ile analiz edilmiştir. Ayrıca akriloil türevli bileşiklerin dönüşümlü voltametri ile inhibitör çalışmaları gerçekleştirilmiştir. UVVIS spektroskopik çalışmalar sonucunda bileşiklerin EtOH, CHCI3 ve DMF içerisinde çekilen spektrumlarında ???* ve n??* soğurma piklerinin varlığı ve bileşiklerin enolimin tautomer yapısında bulunduğu belirlenmiştir. IR ve NMR spektroskopik verileri de bileşiklerin enolimin tautomer yapısında olduğunu göstermiştir. Korozyondan korunmada inhibitör olarak etkinliği incelenen maddelerin 0,1 M NaOH ortamında koruma sağlamadığı ancak NaCl ve H2SO4 gibi ortamlarda etkin korunma sağlayabileceği belirlenmiştir.Öğe Çevresel atıkların yapı malzemesinde değerlendirilmesi(2013) Murathan, Ayşe; Asan, Abdurrahman; Abdulkarem, Taha A.Bu çalışmada, Türkiye’de yeralan bazı çevresel atıklar tuğla kilinde kullanılarak kompozit malzeme üretilmiştir. Kompozit malzeme üretiminde ana hammadde Reşadiye kili; dolgu malzemeleri ise Kütahya- Emet Bor İşletmesi bor atığı, Seyitömer Termik Santral uçucu külü ve Ankara-Tatlar Atıksu Arıtma Tesisi arıtma çamurudur. Değişik kaynaklardan elde edilen numuneler önce öğütülmüş daha sonra değişik oranlarda iyice karıştırılmış, nemlendirilmiş ve kalıplara dökülmüştür. Deneylerde kütle temel alınmak üzere kompozitlerde bor atığı % 2,5-20; uçucu kül % 2,5-10; arıtma çamuru % 0-10 ve tuğla kili % 75-85 oranında kullanılmıştır. 50x50x50 mm ebadındaki küp numuneler sırasıyla oda sıcaklığında 24 saat, daha sonra 105±1 °C’de 12 saat kurutulmuştur. Birim hacim ağırlığı, kuruma küçülmesi, su emme, basınç dayanımı ve kütle kaybı deneyleri sonunda, TS EN 771-1 standardı olan tuğla fiziksel parametrelerine kısmen yaklaşıldığı tespit edilirken aynı zamanda enerji tasarruflu ve çevre dostu kompozit malzeme üretilmiştir.Öğe Combined experimental and theoretical investigation of characterization and hydrogen storage properties of Zn(II) based complex and composites(Elsevier Ltd, 2015) Öztürk, Zeynel; Özkan, Göksel; Asan, Abdurrahman; Köse, Dursun AliMetal organic structured coordination complex was synthesized by using Zn(II), 1,10 Phenantroline and teraphtalic acid building blocks. Then the synthesized compound have been characterized with Ft-IR, TGA/DTA/DrTGA, EA, SEM, surface area analysis and PXRD techniques. After that, the composites have been prepared with the Pt loaded activated carbon additive. Also, all the adsorbents were simulated by using Materials Studio 7.1 (MS); Amorphous Cell module and Atom volumes & Surfaces tool as a visualizer. Then hydrogen storage properties of simulated adsorbents were calculated by using the Sorption module of MS. It is found that the compound and its composites could uptake hydrogen with the capacity in 0.4-0.6 wt.% range experimentally at 77 K and 1 bar pressure while the range was 0.25-0.50 wt.% theoretically at the same conditions. Maximum hydrogen uptake have been observed by using additive free compound which was 0.594 wt.% experimentally at 77 K and 1 bar. Simulated hydrogen adsorption performances were 0.51 and 0.57 wt.% at 77 K, 1 and 100 bar respectively for additive free compound. © 2015 Hydrogen Energy Publications, LLC.Öğe Corrosion behaviour and electrical conductivity of reinforced TiAl3 and B4C hybrid aluminium composites(Polish Academy of Sciences, 2017) Erek, H. B.; Özyürek, Dursun; Asan, AbdurrahmanIn this study, corrosion and electric conductivity of aluminum hybrid composites (in situ TiAl3 and ex situ B4C) produced by powder metallurgy are investigated. Hybrid (in situ and ex situ) aluminum composite powders are produced by adding different amounts of titanium and B4C into AA7075 alloy powders. After the hybrid composite powders are cold pressed (600 MPa), they are sintered in atmosphere controlled furnace at 580°C for 4 h. As a result of this study, it was observed that increase of B4C%(Ti constant) decreases density and increase of Ti%(B4C constant) increases the density of composites. It was determined that corrosion resistances (Rp) of hybrid composites decreased due to interface surfaces formed between the reinforcement phase and the matrix.Öğe Corrosion Protection of AISI 1010 Using Doped MoS2 Conductive Polymers(2020) Asan, Gülden; Asan, AbdurrahmanIn this study, corrosion resistance of the coatings obtained by electrochemical oxidation of pyrrole and aniline on mild steel has been investigated in 0.1 M hydrochloric acid medium. It was aimed to increase the resistance of the coatings to corrosion by adding MoS2 to the coating solutions while covering the polypyrrole (PPy) and polyaniline (PANI). PPy, PANI, MoS2 doped PPy and MoS2 doped PANI coatings on the electrodes produced from mild steel were obtained by cyclic voltammetry in 0.1 M H2C2O4 environment. The voltammogram were carried out at a scan rate 100 mV/s from 0.0 V to 1.0 V with 10 scans. The corrosion resistance of the coatings in 0.1 M HCl medium was determined by Tafel polarization method. Best results were determined in MoS2 doped PPy coatings. Later, PPy coatings, MoS2 added PAN coatings and PANI coatings were determined respectively. The addition of MoS2 to the coating solution increased the corrosion resistance in both coatings. Similar results were obtained in different media in our previous studies. It is understood that MoS2 additive makes the coating surface impermeable and prevents deformation in the coating.Öğe Determination of biogenic amines at low ?g L–1levels as acetylacetone derivatives by RP-HPLC with UV-visible detection in expired apple juice samples(Slovensko Kemijsko Drustvo, 2018) Akmeşe, Bediha; Asan, AbdurrahmanAn accurate and sensitive method for trace quantification of three biogenic amines in expired apple juice samples based on reversed-phase liquid chromatography (RP-HPLC) with UV-visible detection is described. Biogenic amines including cadaverine, histamine, and tyramine, were converted to their acetylacetone derivatives in water-methanol medium. The proposed method involves a pre-column derivatization of species followed by RP-HPLC separation with Thermo Hypersil Gold reversed-phase column and UV detection at 315 nm. A flow rate of 0.9 mL min–1 was used in the proposed method. An efficient separation of biogenic amines was successfully performed in 11 min with a good resolution using 35:65% (v/v) acetonitrile-water mixture as the mobile phase. Detection limits of 0.03, 0.23, and 0.08 ?g L–1 were obtained for cadaverine, histamine and tyramine, respectively. The proposed method has been successfully applied for the analysis of two different commercially available expired apple juice samples. Recovery rates between 98.78 and 102.12% were obtained with an RSD of 0.16–1.65% for the analysis of 20 mL of expired apple juice samples indicating that the recoveries of biogenic amines were very satisfactory. © 2018 Slovensko Kemijsko Drustvo. All Rights Reserved.Öğe DistaloyAB tozundan üretilmiş ve elmas nanoparçacık katkılı krom kaplanmış toz metal malzemelerin korozyon davranışlarının araştırılması(Gazi Üniversitesi, 2017) Bilgili, E. Zeynep; Salamcı, Elmas; Asan, AbdurrahmanBu çalışmada; iki farklı kimyasal bileşimdeki DistaloyAB tozlarından üretilen numunelere uygulanan nanoelmas ilaveli krom elektrokaplama işleminin numunelerin mikroyapı ve korozyon davranışına etkisi incelenmiştir. % 0,2 ve % 0,5 karbon ilaveli DistaloyAB tozları 420 MPa basınçta sıkıştırılmış ve sinterlenmiştir. Üretilen numunelerin SEM ve AFM incelemesi ve korozyon testleri yapılmıştır. Numunelerin korozyon hızları 0,1M H2SO4 ve 0,1M NaOH çözeltilerinde, Tafel ekstrapolasyonu yöntemi ile ölçülmüştür. Deneysel sonuçlar, toz metal numunelerin nanoelmas ilaveli krom ile kaplanması ile korozyon hızlarında önemli azalmalar olduğunu göstermiştirÖğe Electrical conductivity and corrosion performances of in situ and ex situ AA7075 aluminum composites(Polish Academy of Sciences, 2017) Erek, H. B.; Özyürek, Dursun; Asan, AbdurrahmanThe present study investigates corrosion behaviors and electric conductivity of AA7075 in situ (TiAl3) and ex situ (B4C) composites produced by powder metallurgy method. In production of in situ composites, various amounts of Ti (2, 4 and 6%) are added to AA7075 and for production of ex situ composites, B4C (3, 6, and 9%) are added. Prepared in situ and ex situ composite powders were pre-shaped at 600 MPa pressure with cold pressing. Pre-shaped samples were sintered in the atmosphere-controlled furnace at 580°C for 4 h. Corrosion test of produced composites was conducted in 0.1 M H2SO4 solution. As a result of these analyses, corrosion examinations on in situ manufactured composites revealed that anode and cathode currents are close to each other and those composites do not exhibit different corrosion behaviors. Corrosion rate of B4C added ex situ composites increases by B4C rate (due to increase of density of current).Öğe Elmas nano parçacık takviyeli krom kaplanmış gözenekli toz metal parçaların korozyon davranışlarının araştırılması(Gazi Üniversitesi, 2016) Bilgili, E. Zeynep; Salamcı, Elmas; Asan, Abdurrahman; Ünal, Rahmi; Valov, RadoslavBu çalışmada, su atomizasyon yöntemi ile üretilmiş, %0,2 ve %0,5 karbon takviyeli Distaloy tozları 420 MPa sıkıştırma basıncında tek eksenli pres ile sıkıştırılmış, 1120ºC’de 30 dakika sinterlenmiştir. Elde edilen numunelere elektrokimyasal yöntemle nano elmas takviyeli krom kaplama yapılmıştır. Bu çalışmada kaplanmamış ve kaplanmış numuneler karşılaştırılarak, kaplamanın toz metal numunelerin sertlik ve korozyon davranışı üzerindeki etkisi incelenmiştir. Numunelerin optik mikroskop, SEM ve XRD incelemesi, yoğunluk ölçümü, sertlik ve korozyon testleri yapılmıştır. Korozyona karşı davranışı 0,1 M NaCl çözeltisinde, Tafel ekstrapolasyonu yöntemi ile araştırılmıştır. Deneysel sonuçlar, toz metal numunelerin nano elmas takviyeli krom ile kaplanmasının, numunelerin sertlik ve korozyon direncini artırdığını göstermiştir.Öğe Evaluation of environmental wastes in building material(2013) Murathan, Ayşe; Asan, Abdurrahman; Abdulkarem, Taha A.In this study, it was produced composite material by using environmental waste sources of Turkey in brick clay. It was selected Resadiye Clay as main material and boron waste of Kütahya-Emet Boron Works, fly ash of Seyitömer Power Plant and wastewater treatment sludge of Ankara- Tatlar Wastewater Treatment Plant as filling materials. Obtained samples from various resources were firstly grinded, then well mixed in different ratios, moistened and poured into the molds. In the experiments mass percent of boron waste, fly ash and treatment sludge were changed in composites respectively between (2.5-20%), (2.5-10%) and (0-10%) and brick clay was used between 75-85%. Shaped samples which have 50x50x50 mm dimension were dried at room temperature for 24 hours and after that at 105±1 °C for 12 hours respectively. Specific bulk density, drying shrinkage, water absorption, compressive strength and loss of mass tests were carried out. At the end of the tests, it has been conclused approach to the TS EN 771-1 brick standard physical parameters partly also, it has been produced energy conservative and environmentally friendly composite material.Öğe Experimental and simulation study on structural characterization and hydrogen storage of metal organic structured compounds(Elsevier Ltd, 2016) Öztürk, Zeynel; Özken, Göksel; Köse, Dursun Ali; Asan, AbdurrahmanOne of the barrier for common usage of hydrogen energy system is storing hydrogen efficiently. Especially for mobile applications, it is very important to store hydrogen in small spaces reversibly. Metal-organic framework (MOF) structured materials step forward with the ability of reversible hydrogen storage which meet the storage targets. The MOF structured compounds were synthesized using Cu(II) and Zn(II) metals, trimesic acid (benzene 1,3,5 tricarboxylic acid) (TMA) and 1,10 phenantroline (Phen) building blocks. The compounds were activated thermally at 398 K for 4 days under a vacuum for sorption experiments. Then, DTA/TGA, FT-IR, powder-XRD, BET surface area and elemental analysis techniques were used to determine the molecular structures of the synthesized compound. Finally, the hydrogen storage properties were measured at 77 K and 1 bar of hydrogen pressure. In addition to experimental investigations, hydrogen adsorption characteristics and performances of the compounds were also determined with the molecular simulation calculations. It is found that the Cu(II) and Zn(II) compounds could uptake 2.652 wt. % (sim. 2.434 wt. %) and 1.383 wt. % (1.187 wt. %) respectively, at 77 K and 1 bar pressure. Consequently, hydrogen adsorption mechanism and capacities of the compounds clarified. And it is found out that the compounds have good storage performance in comparison to the previously reported MOFs. © 2015 Hydrogen Energy Publications LLC.Öğe Hydrogen storage properties of mono-and bidentate MOF structured orotate complexes(Materials Research Society, 2014) Öztürk, Zeynel; Köse, Dursun Ali; Asan, Abdurrahman; Öztürk, Banu; Andaç, Ömer; Özkan, GökselOne of the barriers for wide usage of hydrogen energy system is efficient storage. To store more hydrogen efficiently, physisorption is a choice among the others with high storage performance, reversibility, and lifecycles. Metal organic framework (MOF) structured organometallic orotate-Co(II) complexes could serve as sorbents which store hydrogen by physisorption. In this work, mono-and bidentate MOF structured orotate-Co(II) complexes are synthesized, characterized, and then investigated for hydrogen storage experimentally and theoretically. It is found that these compounds could store hydrogen. Especially, the monodentate complex could uptake hydrogen better than the other. Storage performances for mono-and bidentate complexes were 0.80 and 1.15 wt% at 77 K and approximately 80 bars experimentally, 1.03 and 1.16 wt% theoretically for the same conditions. © 2013 Materials Research Society.Öğe Inhibitor effect of nicotinamide on corrosion of aluminum(Elsevier, 2020) Asan, Gulden; Asan, AbdurrahmanThe inhibitory effect of nicotinamide on the corrosion of aluminum in 0.1 M NaCl and 0.1 M NaOH aqueous solutions was investigated in this study for the first time. In this study, the inhibitory effect of nicotinamide on corrosion of aluminum in 0.1 M NaCl and 0.1 M NaOH aqueous solutions was investigated. Since nicotinamide has nitrogen and oxygen atoms with unpaired electrons in its structure, it has been chosen with the idea that it may be a good inhibitor candidate. Nicotinamide is also an environmentally friendly compound without toxic effects. For the best inhibitor activity of nicotinamide, time and inhibitor concentration parameters were investigated. The best inhibitory activity time and inhibitor concentration was determined as 60 min and 500 ppm respectively. Tafel Polarization method was used for corrosion rate measurements. Cyclic Voltammogram were taken to determine the electrochemical behavior of aluminum in saline and basic environments that do not contain inhibitors and contain inhibitors of different concentrations. For both media, it was found that as inhibitor concentration increased, corrosion potential shifted to positive values and corrosion current decreased. This shows that nicotinamide, as an anodic inhibitor, reduces the anodic reaction by forming a film on the aluminum surface. (C) 2019 Elsevier B.V. All rights reserved.Öğe Novel 2D micro-porous metal-organic framework for hydrogen storage(Elsevier Ltd, 2016) Öztürk, Zeynel; Köse, Dursun Ali; Şahin, Zarife Sibel; Özkan, Göksel; Asan, AbdurrahmanA novel two dimensional Metal-Organic Framework (MOF) structured compound with trimesic acid (TMA), 1,10 Phenantroline (Phen) and Cu(II) building blocks were synthesized and characterized experimentally. Then Grand Canonical Monte Carlo (GCMC) simulation calculations used for determination of hydrogen adsorption capacity and surface characteristics of the compound theoretically. Three different regions were determined for the adsorbent, which were micro, micro/sub-meso spaces inside the adsorbent and the surface regions. It is found that the synthesized compound could uptake approx. 1.3 and 1.2 wt.% hydrogen at 77 K, 100 bars and 1 bar respectively. Thus the adsorbent that is synthesized in this work have strong hydrogen adsorption capability in comparison to the previously reported ones. © 2016 Hydrogen Energy Publications LLCÖğe Oxidative desulfurization of cayirhan lignites by permanganate solution(2008) Gürü, Metin; Tüzün, Fatma Nihal; Selek Murathan, Ayşe; Asan, Abdurrahman; Kıyak, TülinUnless important developments record new and renewable energy sources, the role of fossil fuels as an energy resource goes on. It is possible to detect sulfur, heavy metals, and tracer elements such as arsenic and selenium by decreasing calorific value of coals. Sulfur oxides, which are the main pollutants in atmosphere, are irritative to humans and plants, and erosion occurs on buildings. Although there are high lignite reservoirs, high sulfur content limits the efficient use of them. In this research, it is aimed to convert combustible sulfur in coal to non-combustible sulfur form in the ash by oxidizing it with permanganate solution. During this research, the effect of two different parameters of potassium permanganate concentration, processing time, and mean particle size were investigated at constant room temperature and shaking rate. The conversion of combustible sulfur to non-combustible sulfur form was achieved optimally with 0.14 M potassium permanganate solution, 0.1 mm mean particle size at 16 h of treatment time, and the combustible sulfur amount was decreased by 46.37% compared to undoped conditions.Öğe Synthesis of novel Schiff Bases containing acryloyl moiety and the investigation of spectroscopic and electrochemical properties(Elsevier B.V., 2016) Sılku, Pakize; Özkınalı, Sevil; Öztürk, Zeynel; Asan, Abdurrahman; Köse, Dursun AliA novel Schiff bases and their acryloyl derivatives were synthesized through the reaction of p-hydroxybenzaldehyde in order of with aniline, p-chloroaniline, p-nitroaniline, p-methylaniline and p-aminobenzoic acid. The structures of these compounds were characterised spectroscopic techniques such of IR, 1H NMR, 13C NMR and Mass spectroscopy. ????and n???transitions were determined via UV-vis spectroscopy studies performed in EtOH, CHCl3, and DMF. Furthermore, the inhibition efficiencies of these new compounds were investigated on the surface of steel within the solution of 0.1 M NaCl, 0.1 M NaOH and 0.10 M H2SO4 solution via cyclic voltammetry and Tafel extrapolation methods. © 2016 Elsevier B.V.Öğe The effect of 2D-MoS2 doped polypyrrole coatings on brass corrosion(Elsevier B.V., 2020) Asan, Gülden; Asan, Abdurrahman; Çelikkan, HüseyinConductive polymers have an important potential against the corrosion applications because they arehighly resistant to chemicals besides they have homogeneous coating properties and transport metals tomore noble regions. However, the major disadvantage of conductive polymers such as polypyrrole (PPy)is their low mechanical strength. In this study, the doping effect of MoS2into the PPy coatings by theelectropolymerization of polypyrrole (PPy) and exfoliated MoS2on the corrosion of brass was investi-gated. The corrosion protection of these coatings were determined by measuring the corrosion rates withTafel polarization method in 0.1 M H2SO4media. PPy and MoS2doped PPy (MoS2@PPy) coatings weresuccessfully obtained by the use of chronoamperometry technique in 0.2 M H2C2O4solutions with 0.2 Mpyrrole and various concentrations of MoS2. It was observed that MoS2@PPy coatings were homoge-neously coated without and with all MoS2concentrations on the metal surface and well adhered to thebrass surface, but MoS2@PPy coating with 25 ppm MoS2showed the best corrosion protection. Thesurface and chemical characterizations of the coatings were performed by SEM-EDS
