论文部分内容阅读
选用4种不同类型的机械液压杆为试验对象,对比分析了不同时间盐雾/干/湿交替循环腐蚀试验条件下试样的宏观和微观腐蚀形貌、腐蚀速率和物相组成。测试了不同循环腐蚀时间下机械液压杆的腐蚀速率。结果表明,0Cr17Ni4Cu4Nb马氏体不锈钢的耐腐蚀性能最好,其次为302奥氏体不锈钢,而40Cr中碳调质钢的耐腐蚀性能最差;4种机械液压杆的耐腐蚀性能从低至高依次为:40Cr中碳调质钢<18Cr2Ni4合金钢<302奥氏体不锈钢<0Cr17Ni4Cu4Nb马氏体不锈钢;5 000 h盐雾/干/湿交替循环腐蚀试验后机械液压杆的表面腐蚀形貌观察结果与腐蚀速率和点腐蚀评价结果一致。
Four different types of mechanical hydraulic rods were selected as test objects to compare the macro-and micro-corrosion morphology, corrosion rate and phase composition of the samples under different salt spray / dry / wet alternate cyclic corrosion tests at different times. The corrosion rate of mechanical hydraulic rod under different cyclic corrosion time was tested. The results show that the corrosion resistance of 0Cr17Ni4Cu4Nb martensitic stainless steel is the best, followed by 302 austenitic stainless steel, while the corrosion resistance of 40Cr medium carbon steel is the worst. The corrosion resistance of 4 mechanical hydraulic rods is from low to high As follows: 40Cr carbon quenched and tempered steel <18Cr2Ni4 alloy steel <302 austenitic stainless steel <0Cr17Ni4Cu4Nb martensitic stainless steel; 5 000 h salt spray / dry / wet alternate cycle corrosion test mechanical hydraulic rod surface corrosion morphology observation results and Corrosion rate and pitting corrosion evaluation results.