不锈钢与高碳钢的冲刷腐蚀磨损试验研究

Investigation to Erosion-Corrosion Behavior of Stainless Steel and High Carbon Steel

利用自行研制的液固两相流冲刷腐蚀磨损试验机,对具有良好耐腐蚀性能的1Cr18Ni9Ti(18-8)不锈钢及耐磨性较好的高碳钢(T8)的耐冲刷腐蚀磨损行为进行了深入研究.试验机配有电化学测试系统,可有效分离液固两相流冲刷腐蚀磨损工况下的各损伤分量,如纯磨损分量、纯腐蚀分量以及腐蚀与磨损的交互作用,便于深入研究冲刷腐蚀磨损工况下材料的损伤行为.研究结果表明:在此试验条件下,材料的耐腐蚀性能居主导地位,改变冲刷腐蚀条件尽管使各损伤分量的相对比例有所改变,但耐蚀性较好的18 8不锈钢总具有较低的损伤;18-8不锈钢和T8钢的冲刷腐蚀磨损率在冲蚀角度为45°时均出现极大值,主要原因为材料在此角度下的磨损达到最大值,并且由此产生的交互作用也达到最大值,因此在这一角度使用的材料应注重提高其耐磨性.

The erosion-corrosion behavior of 1Crl8Ni9Ti (designated as 18-8) steel and high carbon steel (mass fraction of carbon is 0.8%, designated as T8) was investigated via self-made liquid-solid two-phase flow erosion-corrosion tester. The electrochemical measurement system fixed on the tester could separate the pure corrosion rate and the pure erosive rate from the total erosion-corrosion rate effectively during the wear tests, so the interaction between corrosion and erosion of the materials could be obtained. The results show that 18-8 steels which has a superior corrosion resistance to T8 steel represents a good erosion-corrosion resistance under different test conditions such as different erosive angles, different erosive velocity and different slurry temperature. This means that the corrosion resistant properties of the materials play an important role under the test conditions. The erosion-corrosion resistance of 18-8 and T8 steels is reduced to absolute inferiority while the erosion angle is set up as 45° The reason is that the values of pure erosive rate and interaction rate of both reach the maximum at this angle, thus more attention must be paid for the wear resistance of the materials under this situation.