铬不锈钢/碳钢梯度材料的耐腐蚀性研究

Research on Corrosion Resistance of Chromium Stainless Steel/Carbon Steel Gradient Materials

通过水溶液电沉积法在碳钢表面电沉积铬,并在高温下进行扩散退火处理,形成了一种铬不锈钢/碳钢梯度材料。采用电化学测试实验法对该材料的耐腐蚀性进行研究;利用Tafel直线外推法对基体与铬不锈钢/碳钢梯度材料的极化曲线进行拟合。结果表明:铬不锈钢/碳钢梯度材料的耐腐蚀性要高于碳钢基体的;随着含铬量的增加,梯度材料的耐腐蚀性依次增强。表面Cr的百分含量与腐蚀电位的关系为E=-1.6+0.01514 W_(Cr)。

Chromium was electrodeposited on the surface of carbon steel by aqueous electrodeposition and then diffusion annealed at high temperature to form a chromium stainless steel/carbon steel gradient material. The corrosion resistance of the material was studied by electrochemical test method, and the polarization curve of the matrix and chromium stainless steel/carbon steel gradient material was fitted by Tafel linear extrapolation method. The results show that the corrosion resistance of chromium stainless steel/carbon steel gradient material is higher than that of carbon steel matrix, and the corrosion resistance of the gradient material increases successively with the increase of chromium content. The relationship between the percentage of Cr obtained and the corrosion potential is E=-1.6+0.01514 Wa.