Objective To study the corrosion resistance performance of 3 coating systems (C1, C2, C3) of 30CrMnSiA alloy steel under Xisha marine environment. Method Natural exposure experiments for three coating systems of 30CrMnSiA alloy steel were carried out in Xisha marine environment. The exposure time of experiment was 3 years. Corrosion characteristics and corrosion conditions were tested by measuring the gloss, color difference and electrochemical impedance value.Results The gloss and chromatic aberration of the three coatings decreased gradually with the time increase. The gloss and color difference of the three coatings after exposure were not very different. But the electrochemical impedance values of the three coatings were very different. The impedance value of C1 coating was significantly larger than those of the C2 and C3 coatings.Conclusion C1 coating system has higher corrosion resistance compared with C2 and C3 two coating systems..%目的 研究西沙海洋环境下30CrMnSiA合金钢三种(C1,C2,C3)涂层体系的耐腐蚀性能.方法 在西沙海域环境开展30CrMnSiA合金钢三种涂层的自然暴晒实验,暴晒实验时间为3年,分别通过测试光泽度、色差、电化学阻抗值等手段检测腐蚀状况来研究腐蚀特点.结果 三种涂层的光泽度和色差随着时间的增长逐渐减少,暴晒后三种涂层的光泽度和色差相差不大,但三种涂层检测的电化学阻抗值相差很大,且C1涂层阻抗值明显大于C2和C3涂层.结论 C1涂层体系相较于C2和C3两种涂层体系有更高的耐腐蚀性能.
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