钙离子对热镀锌钢在模型混凝土孔隙溶液中腐蚀行为的影响

Q3 Materials Science Koroze a ochrana materialu Pub Date : 2019-03-01 DOI:10.2478/kom-2019-0004

P. Pokorný, M. Kouřil

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引用次数: 1

摘要

摘要本文采用常规电化学方法（测量自由氧化电位和极化电阻）、表面分析方法（光学和共聚焦显微镜）和沉淀腐蚀产物的XRD相分析，评价了钙离子对热镀锌钢在模型混凝土孔隙溶液中腐蚀行为的影响。这些实验结果证实了目前关于类似主题的工作的结论，即在混凝土孔隙溶液模型（pH 12.6；13.0）中，结晶钙基腐蚀产物Ca[Zn（OH）3]2·2H2O不能有效钝化热镀锌钢表面。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Influence of calcium cations on the corrosion behavior of hot-dip galvanized steel in model concrete pore solutions

Abstract In this paper, the influence of calcium cations on the corrosion behavior of hot-dip galvanized steel in model concrete pore solutions is evaluated by means of conventional electrochemical methods (measurement of free corosion potencial and polarization resistance), surface analysis methods (optical and confocal microscopy) and XRD phase analysis of precipitated corrosion products. The results of these experiments confirm the conclusions of the current work on a similar topic, i.e. the crystalline calcium based corrosion products Ca[Zn(OH)3]2·2H2O are not able passivate effectively surface of hot-dip galvanized steel in model of concrete pore solutions (pH 12.6; 13.0). If passivation occurs, a mixed Ca[Zn(OH)3]2·2H2O, ZnO and Zn(OH)2 is involved.

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