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采用冷气动力喷涂技术在低碳钢表面制备了304不锈钢涂层,并分别进行300、600、800和950 ℃保温1 h的退火热处理,研究了不同退火温度对涂层组织和耐蚀性能的影响.结果表明:冷喷涂涂层由大量变形粒子搭接构成,粒子间界面清晰可见.950 ℃退火处理后,涂层组织由等轴晶构成,大量粒子间界面消失.电化学测试结果表明涂层的腐蚀速率随退火温度升高而降低,涂层在950 ℃退火条件下达到最低腐蚀速率0.145 mm/y.

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