Effect of Ca²⁺ additives on morphology, composition and corrosion resistant of Zn-12%Ni phosphate coating

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• 作者：Hafez Alizadeh^a ; Amir Hanaei^b ; Amirhosein Pakseresht^c ; Armita Shahbazkhan^d ; Naghi Parvini Ahmadi^a ; Fazel Baniasadi^d ; ^{fazel.baniasadi@gmail.com" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Ca2+ ; Phosphate coating ; Zn&ndash ; Ni alloy ; Hopeite
• 刊名：Journal of Materials Research and Technology
• 出版年：2016
• 出版时间：October-December 2016
• 年：2016
• 卷：5
• 期：4
• 页码：327-332
• 全文大小：1727 K

文摘

The aim of this study is to investigate the effect of phosphate solution with Ca²⁺ additives on weight, surface morphology and electrochemical behavior of phosphated Zn–Ni film. In order to characterize structure and morphology of surface, X-ray diffraction (XRD) and scanning electron microscopy (SEM) were applied, respectively. Results showed that the main composition in produced coatings was hopeite Zn₃(PO₄)₂·4H₂O, which has high corrosion resistance. On one hand, in the presence of Ca²⁺ cations in solution, the weight of phosphate coating decreased, but on the other hand surface uniformity and corrosion resistance of the coating increased.