利用电化学测试手段研究冷喷涂铝涂层在海水环境中的腐蚀行为,并研究了冷喷涂铝涂层在中性盐雾中腐蚀速度的变化规律.结果表明,海水环境中冷喷涂铝涂层表面覆盖致密稳定的腐蚀产物,有效阻止了腐蚀介质向涂层内部的渗透,腐蚀速度随腐蚀时间的增加迅速降低.
The corrosion behavior of Q235 steel coated with cold-sprayed aluminum in seawater was examined by electrochemical methods in this work, and the variation of corrosion rate of the aluminum coating was studied by neutral salt spray test. The result indicates that after immersion in seawater the cold-sprayed aluminum coating was covered with a stable corrosion product scale which effectively prevents the coating from further seawater corrosion. The corrosion rate of the aluminum coating declined rapidly with time in neutral salt spray circumstance.
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