Electrochemical Generation of Zn-Chitosan Composite Coating on Mild Steel and its Corrosion Studies

Vathsala, K.

doi:10.4236/engineering.2010.28074

Cited by 2 publications

(3 citation statements)

References 10 publications

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“…The addition of extract provides protection layer in the surface, and the protection surface reach almost 100% of surface area for extract concentration of 2.5%. It is observed that the protective surface layer contains oxygen and other functional groups, as also observed by other researcher [12]. This is also consistent with the protection mechanisms that occur in the case using other natural ingredients [13] where the compound contains an atom that has a lone pair.…”

Section: Resultssupporting

confidence: 88%

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Effect of Polar Extract of Cocoa Peels Inhibitor on Mechanical Properties and Microstructure of Mild Steel Exposed in Hydrocloric Acid

Gunawarman

Yetri

Emriadi

et al. 2015

AMM

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Effect of addition of theobroma cacao peels extract (TCPE), a new proposed green inhibitor, on tensile and hardness properties, and related microstructure of mild steel exposed in solution of 1.5M HCl was investigated in order to know the contribution of this kind of inhibitor in controlling mechanical properties, in addition to reducing corrosion attack. Corrosion behaviors including inhibition mechanism and adsorption process during exposure were then discussed. Corrosion rate and inhibitory efficiency of mild steel samples containing 0.3%C were determined using weight loss method. The samples were exposed in the acid solution with and without addition of 0.5-2.5% the TCPE. Tensile and hardness tests were subsequently performed on the samples to determine the change of mechanical properties of the metal prior and after addition of the extracts. Sample surface morphologies and chemical composition as well were observed by a scanning electron microscopy equipped with energy dispersive X-ray spectroscopy (SEM-EDX). The results show that the strength, hardness and elongation of mild steel drop significantly due to heavy damage in the surface after immersion in the HCl solution for 32 days. However, these mechanical properties gradually increase with increasing concentration of the extract following the increase of surface coverage and inhibition efficiency. The increase of the tensile properties and hardness is due mainly to the ability of the inhibitor to cover mild steel surface through formation of metal-organo complexes protection layer in the surface of the mild steel. Although total carbon level in the surface of the mild steel also increases significantly, there is no any proof of carbon difussion into the mild steel. The addition of polar extract of theobroma cacao peels into a solution of 1.5 M HCl is, therefore, not only effective to minimize the degradation on the mild steel surface, but it also diminishes the mechanical properties reduction of the mild steel.

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Section: Resultssupporting

confidence: 88%

“…It is needed around 2.5%v of TCPE to cover the entire surface. This indicates that the inhibitor is able to form a surface layer which can block the attack of such aggressive acid, as also observed by other researcher [12]. However, the layer is not observed clearly in optical micrographs.…”

Section: Resultssupporting

confidence: 62%

Effect of Polar Extract of Cocoa Peels Inhibitor on Mechanical Properties and Microstructure of Mild Steel Exposed in Hydrocloric Acid

Gunawarman

Yetri

Emriadi

et al. 2015

AMM

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“…A significant increase in the charge transfer resistance was observed for coated mild steel surfaces. The electro-deposition of Zn-chitosan composite coating on mild steel and its corrosion studies has been reported in 3.5% NaCl [47], Self-healing protective coatings with chitosan based pre-layer reservoir [48], chitosan/diclofenac coatings for medical grade stainless steel [49], copper modified chitosan inhibition of AA-2024 corrosion [50], 2-Mercaptobenzothiazole (MBT) based functionalized chitosan-based coatings for active corrosion protection of AA2024 alloy [51], chitosan/Silver nanoparticles composite on St37 steel corrosion in a 15% HCl solution [52], self-healing protective coatings chitosan doped with cerium nitrate for inhibition of aluminum alloy 2024 [53] and Poly(itaconic acid)-modified chitosan for inhibition of aluminum corrosion [54] and other composites materials have also been investigated as effective chitosan based coatings.…”

Section: Main Bodymentioning

confidence: 99%

Chitosan-Based Green and Sustainable Corrosion Inhibitors for Carbon Steel

Verma¹,

Kumar²,

Mazumder³

et al. 2018

Chitin-Chitosan - Myriad Functionalities in Science and Technology

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Development of non-toxic and environmental friendly corrosion inhibitors is highly desirable owing to the increasing demands of "green chemistry" throughout the world. In view of these several forms of green corrosion inhibitors such as drugs or medicines, plant extracts, ionic liquids and synthetic inhibitors derived from multicomponent reactions (MCRs) and mechanochemical mixing are being employed. Nowadays, MCRs in association with microwave and ultrasound irradiations represent one of the best green strategies. Natural polysaccharides particularly chitosan derivatives gained substantial advancement. Chitosan and its several derivatives have been employed effective as corrosion inhibitors for metals and alloys in various aggressive media. The present chapter features the collection of major works that have been published on the inhibition effect of chitosan and its derivatives. The utilization of the chitosan and its derivatives as effective corrosion inhibitors is based on the fact that they contain several polar functional groups such as amino (-NH 2), hydroxyl (-OH) and acetyl (-COCH 3) groups that effectively bind with metallic surface and behave as adsorption centers.

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Electrochemical Generation of Zn-Chitosan Composite Coating on Mild Steel and its Corrosion Studies

Cited by 2 publications

References 10 publications

Effect of Polar Extract of Cocoa Peels Inhibitor on Mechanical Properties and Microstructure of Mild Steel Exposed in Hydrocloric Acid

Effect of Polar Extract of Cocoa Peels Inhibitor on Mechanical Properties and Microstructure of Mild Steel Exposed in Hydrocloric Acid

Chitosan-Based Green and Sustainable Corrosion Inhibitors for Carbon Steel

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