Formation mechanisms of environmentally acceptable chemical conversion coatings for zinc: a review

Gao, Zhiqiang; Zhang, Dawei; Li, Yong; Jiang, Sheming; Zhang, Qifu

doi:10.1007/s11998-018-0076-1

Cited by 37 publications

(28 citation statements)

References 107 publications

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“…However, there are many concepts available related to the identity of the molybdenum species, but in general, it can be said that the major species are probably Mo(IV), Mo(V), or Mo(VI) containing. [ 10 ] It is to be mentioned here that cerium‐modified molybdate coating provides self‐healing property on Steel. [ 44 ]…”

Section: Chemical Coating Methodsmentioning

confidence: 99%

“…Hydrofluoric acid of group IV(B) metals (in the periodic table) and their salts, predominantly fluorozirconate, fluorotitanate, and their ammonium salts, can be used as better substitute for chromates coating on Zn substrate because they produce uninterrupted series of polymers or 3D metalloid‐oxide matrices in aqueous media. [ 10,71 ]…”

Section: Chemical Coating Methodsmentioning

confidence: 99%

“…‐11]. [ 10 ]

([], Zn) OH goodbreak+ Ce ((), III) OH \to ([], Zn) normalO Ce ((), III) OH goodbreak+ H^{+}

([], Zn) normalO Ce ((), III) OH goodbreak+ Ce ((), III) OH \to ([], Zn) normalO Ce ((), III) normalO Ce ((), III) OH goodbreak+ H^{+}

2 ([], Zn) normalO Ce ((), III) OH \to ([], Zn) normalO Ce ((), III) normalO Ce ((), III) ((), OH) normalO ([], Zn) goodbreak+ H^{+}

…”

Section: Chemical Coating Methodsunclassified

“…. [ 10 ]

normalR - Si - {OR}^{'} goodbreak+ H_{2} normalO \to normalR - Si - OH goodbreak+ R^{'} - OH

2R - Si - OH \to normalR - Si - normalO - Si - normalR goodbreak+ H_{2} normalO

normalM - OH goodbreak+ normalR - Si - OH \to normalM - normalO - Si - normalR goodbreak+ H_{2} normalO

…”

Section: Chemical Coating Methodsmentioning

confidence: 99%

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Coatings made from chemicals: A review

Chowdhury,

Nepal,

Bhattarai

et al. 2023

Vietnam Journal of Chemistry

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In the ongoing process of civilization, surface modification has become almost an indispensable route to enjoy the optimum benefit from any material in the materialistic world. Especially, active metals require the modification maximum to escape the natural corrosion or passivation. The retention of sound performance of the metals as well as extension of their lifetime can be achieved by surface modification of coating formation. Chemical coating is one of the simple and low‐cost methods of coating with great versatility including pre‐treatment and post‐treatment. This paper includes the most widely used inorganic and organic chemical coating methods and their fewer details and their future outlooks.

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Section: Chemical Coating Methodsmentioning

confidence: 99%

Section: Chemical Coating Methodsmentioning

confidence: 99%

“…‐11]. [ 10 ]

([], Zn) OH goodbreak+ Ce ((), III) OH \to ([], Zn) normalO Ce ((), III) OH goodbreak+ H^{+}

([], Zn) normalO Ce ((), III) OH goodbreak+ Ce ((), III) OH \to ([], Zn) normalO Ce ((), III) normalO Ce ((), III) OH goodbreak+ H^{+}

2 ([], Zn) normalO Ce ((), III) OH \to ([], Zn) normalO Ce ((), III) normalO Ce ((), III) ((), OH) normalO ([], Zn) goodbreak+ H^{+}

…”

Section: Chemical Coating Methodsunclassified

“…. [ 10 ]

normalR - Si - {OR}^{'} goodbreak+ H_{2} normalO \to normalR - Si - OH goodbreak+ R^{'} - OH

2R - Si - OH \to normalR - Si - normalO - Si - normalR goodbreak+ H_{2} normalO

normalM - OH goodbreak+ normalR - Si - OH \to normalM - normalO - Si - normalR goodbreak+ H_{2} normalO

…”

Section: Chemical Coating Methodsmentioning

confidence: 99%

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Coatings made from chemicals: A review

Chowdhury,

Nepal,

Bhattarai

et al. 2023

Vietnam Journal of Chemistry

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“…In recent years, attempts have been made to improve the persistence and sustainability of inorganic coatings such as through the utilization of conversion coatings (e.g., phosphate, molybdate, and zirconium conversion coatings) [ 18 , 19 ], which have been employed into the matrix between the organic coating and substrate as a role of an intermediate transition layer. Conversion coatings can improve the epoxy coating’s adhesion to the steel substrate through the surface energy enhancement and changing the surface morphology.…”

Section: Introductionmentioning

confidence: 99%

Development of Calcium Carbonate-Based Coatings by the Carbonation of Gamma-C2S (γ-C2S)

et al. 2022

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A calcium carbonate (CaCO3)-based coating with gamma-C2S (γ-C2S) as the main carbonatable binder is proposed to protect the metal substrate against corrosion in this paper. Here, the morphology and phase assemblage of the coatings are studied by scanning electron microscopy (SEM) and X-ray diffraction (XRD), and the corrosion resistance of the coating is evaluated by electrochemical impedance spectroscopy (EIS) and X-ray photoelectron spectroscopy (XPS). Results show that the carbonated coating has excellent properties in terms of ultraviolet (UV) aging resistance, salt fog resistance, and electrochemical corrosion resistance. The porosity of deposited coating on steel substrates decreases by 47.1% after carbonation due to the compacted calcium carbonate formation, which is recognized as a self-compacting process during carbonation. The coating also exhibits rapid strength development within the first 2 h of carbonation; both the CO2 uptake efficiency and degree of carbonation (DOC) can reach more than 95% of the total CO2 uptake efficiency and final DOC values. This study provides a novel insight to extend the category of inorganic coating with additional benefits of CO2 solidification.

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