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用质量损失法系统研究了不同温度(25和50℃)和不同冲刷速率(0.63—1.88 m/s)下,J4不锈钢、Ni-P和Ni-Cu-P合金镀层,及对比材料316L不锈钢在液-固两相流(20%H_2SO_4+20 g/L Al_2O_3)中的冲刷腐蚀行为,结果表明:不锈钢和镀层的抗冲刷腐蚀性能由高到低依次为镀态Ni-Cu-P,镀态Ni-P,热处理态Ni-Cu P,316 L,J4,提高两相流介质温度均使它们的冲刷腐蚀速率增大。316L不锈钢在25℃液-固两相流介质中的冲刷腐蚀速率分别为镀态Ni-Cu P,镀态Ni-P和热处理态Ni-Cu-P镀层的8.5倍,8倍和2.6倍以上,而在50℃下分别为392倍,80倍和14.8倍以上;J4不锈钢在25和50℃液-固两相流介质中的冲刷腐蚀速率分别为316L不锈钢的28倍和13倍以上,在25和50℃,J4不锈钢分别为选择性腐蚀和均匀腐蚀,而316L不锈钢均为轻微选择性腐蚀,Ni-P和Ni-Cu-P合金镀层均为均匀腐蚀。
The loss of J4 stainless steel, Ni-P and Ni-Cu-P alloy coatings at different temperatures (25 and 50 ℃) and different erosion rates (0.63-1.88 m / s) The results show that the corrosion resistance of stainless steel and coating is in the order of Ni-Cu-P, Ni-Cu-P, Ni-Cu- Ni-P, heat treated Ni-Cu P, 316L, J4, both increase the temperature of the two-phase flow medium to increase their erosion rate. The corrosion rates of 316L stainless steel in liquid-solid two-phase flow at 25 ℃ were 8.5 times, 8 times and 2.6 times higher than those of Ni-Cu P, Ni-P and Ni-Cu-P , Respectively, while they were 392 times, 80 times and 14.8 times respectively at 50 ℃. The erosion corrosion rates of J4 stainless steel in liquid-solid two-phase flow media at 25 and 50 ℃ were 28 times and 13 times higher than that of 316L stainless steel respectively. At 25 and 50 ℃, J4 stainless steel was selective and uniform corrosion, respectively, while 316L stainless steel was slightly selective corrosion, Ni-P and Ni-Cu-P alloy coating were uniform corrosion.