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用质量损失法系统研究Ni-Cu-P及316L不锈钢在含盐酸高温流体中的冲蚀行为。结果表明:Ni-Cu-P和316L在单向流(20%HCl溶液)和两相流(20%HCl溶液+20g/L黄砂)中的冲蚀速率均随流体温度的升高而增大;在353K单相流和两相流中,316L冲蚀速率均为Ni-Cu-P的10倍左右。盐酸浓度对Ni-Cu-P和316L冲蚀速率的影响较温度小。Ni-Cu-P在单向流和两相流中冲蚀机制分别为均匀腐蚀和均匀腐蚀+微切削。316L不锈钢在298K单相流和两相流中冲蚀机制分别为轻微选择性腐蚀和轻微选择性腐蚀+微切削,表面为富Cr钝化膜;而在323～353K,其冲蚀机制分别为选择性腐蚀和选择性腐蚀+微切削,表面为富Mo和Ni的钝化膜。
The erosion behavior of Ni-Cu-P and 316L stainless steel in high-temperature hydrochloric acid-containing fluids was systematically investigated by mass loss method. The results show that the erosion rates of Ni-Cu-P and 316L in unidirectional flow (20% HCl solution) and two-phase flow (20% HCl solution + 20 g / L yellow sand) increase with the increase of fluid temperature In 353K single-phase flow and two-phase flow, 316L erosion rates are about 10 times that of Ni-Cu-P. The effect of hydrochloric acid concentration on the erosion rate of Ni-Cu-P and 316L is less than the temperature. The erosion mechanisms of Ni-Cu-P in unidirectional flow and two-phase flow are uniform corrosion and uniform corrosion + micro-cutting, respectively. The corrosion mechanisms of 316L stainless steel in 298K single-phase flow and two-phase flow were slight selective corrosion and slight selective corrosion + micro-cutting respectively, and the surface was Cr-rich passivation film. At 323 ~ 353K, the erosion mechanisms of 316L stainless steel were Selective corrosion and selective corrosion + micro-cutting, the surface is rich in Mo and Ni passivation film.