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用盐雾加速和极化曲线试验方法研究了TRIP钢在3.5%NaCl溶液中的腐蚀电化学行为。结果表明:两种试样盐雾加速试验后表面均有大面积腐蚀产物出现,且极化曲线均活化。未添加合金元素(A钢)的腐蚀率远高于添加合金元素的(B钢);B钢较A钢的自腐蚀电位明显升高,其腐蚀电流密度下降;B钢表面锈层较为致密,而A钢锈层则相对较为疏松。B钢获得了相对较好的耐蚀效果,主要原因是由于Al、Cu、Cr、Mo、Ni等合金元素在锈层以及锈层与基体的界面中富集,改变了TRIP钢电化学性质所致。
The corrosion electrochemical behavior of TRIP steel in 3.5% NaCl solution was studied by salt spray acceleration and polarization curve test. The results show that a large area of corrosion products appear on the surface of both samples after salt spray acceleration test, and the polarization curves are all activated. The corrosion rate of unalloyed alloy (A steel) is much higher than that of B steel (B steel). The corrosion potential of B steel is obviously higher than that of A steel, and the corrosion current density of B steel is decreased. A rust layer is relatively loose. B steel obtained a relatively good corrosion resistance, mainly due to the Al, Cu, Cr, Mo, Ni and other alloying elements in the rust layer and the rust layer and the matrix interface, changing the electrochemical properties of TRIP steel To