应用电位-pH图研究55%Al-Zn-1.6%Si合金镀层的腐蚀行为

中国腐蚀与防护学报

1986, Vol. 6

Issue (2): 81-90

研究报告

本期目录 | 过刊浏览

应用电位-pH图研究55%Al-Zn-1.6%Si合金镀层的腐蚀行为

杜爱玲;杨熙珍

山东工业大学;山东工业大学

THE APPLICATION OF E-pH DIAGRAM FOR ANALYZING THE CORROSION BEHAVIOR OF 55％Al-Zn 1.6％Si COATING

Du Ailing and Yang Xizhen(Shandong Engineering Institute)

全文: PDF(1200 KB)

摘要: 应用自制的电位-pH平衡图和实验电位-pH图剖析了55％Al-Zn-1.6％Si合金镀层在不同pH条件下的腐蚀过程及其特征;并用化学分析方法跟踪分析了此合金镀层在pH≤5的含氯离子溶液中的腐蚀全过程,得出由开始时的富Zn相或元素Zn的选择性腐蚀,迅速过渡到Al-Zn共同溶解的腐蚀机制;电镜观察证实了此镀层在四个不同的pH区,的确具有不同的腐蚀特征,与电位-pH平衡图给出的结果一致。

Abstract：Both the E-pH equilibrium diagram and the experimental E-pH diagram were used to investigate the corrosion process and characteristics of 55％ Al-Zn-1.6％Si coating.Chemical analysis was used to trace the total corrosion process of the coating in solutions containing Cl-with different pH values(pH=3～5) The corrosion mechanism was revealed to be selective dissolution of Znrich phase or elementary Zn at the very beginning, but rapidly coming to the propotional dissolution of the Al-Zn alloy.The micrography showed that the coating has diverse characters in four different pHvalue regions, feing coincideut with the conclusions derived from the E-pH equilibrium diagram.

收稿日期: 1986-04-25

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引用本文:

杜爱玲;杨熙珍. 应用电位-pH图研究55%Al-Zn-1.6%Si合金镀层的腐蚀行为[J]. 中国腐蚀与防护学报, 1986, 6(2): 81-90.
. THE APPLICATION OF E-pH DIAGRAM FOR ANALYZING THE CORROSION BEHAVIOR OF 55％Al-Zn 1.6％Si COATING. J Chin Soc Corr Pro, 1986, 6(2): 81-90.

链接本文:

https://www.jcscp.org/CN/ 或 https://www.jcscp.org/CN/Y1986/V6/I2/81

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