锌粒形态对富Zn涂层在3.5%NaCl溶液中电化学行为的影响

金属学报, 2005, 41(7): 769-774. doi: 10.3321/j.issn:0412-1961.2005.07.018

锌粒形态对富Zn涂层在3.5%NaCl溶液中电化学行为的影响

谢德明 ^1, , 童少平 ^2, , 冯海 ^3, , 张鉴清 ^4,

1.浙江工业大学,杭州,310032

2.浙江工业大学,杭州,310032

3.浙江工业大学,杭州,310032

4.浙江大学化学系,杭州,310027

基金项目: 国家重点实验室基金

关键词：富Zn漆 , 鳞片Zn粉 , 球形Zn粉 , 电化学阻抗谱 , 阴极保护 , 屏蔽作用

INFLUENCE OF THE PIGMENT SHAPE ON THE ELECTROCHEMICAL BEHAVIORS OF ZINC-RICH PAINT COATINGS IN 3.5% NaCl SOLUTION

针对粘合剂种类、Zn粒形状和涂层厚度的协同作用,采用电化学阻抗谱(EIS)研究了富Zn涂层在3.5%NaCl溶液中的电化学行为.富Zn涂层的EIS谱有两个时间常数,其中,锌的电子转移反应发生在低频段,而高频段则体现聚合物和Zn表面氧化层的介电性质.根据等效电路及其元件参数解释了钢铁/富Zn涂层/盐水体系的EIS测量结果.实验结果表明,鳞片锌消耗速度太快以至于鳞片富Zn涂层在相对较短的时间内就失去了阴极保护作用,随后形成了稍微致密的屏蔽阻挡层.

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锌粒形态对富Zn涂层在3.5%NaCl溶液中电化学行为的影响

INFLUENCE OF THE PIGMENT SHAPE ON THE ELECTROCHEMICAL BEHAVIORS OF ZINC-RICH PAINT COATINGS IN 3.5% NaCl SOLUTION

参考文献