酸洗对薄壁0Cr18Ni9不锈钢腐蚀的试验研究

0Cr18Ni9不锈钢薄壁产品在酸洗过程中易发生过腐蚀。本研究采用0.1 mm厚度0Cr18Ni9不锈钢带,对酸洗的各影响因素进行试验研究,结果表明:材料状态不同,耐腐蚀能力不同,退火态更易出现过腐蚀;酸液温度、浓度及酸洗的时间均对不锈钢带腐蚀程度和力学性能有较大影响;在含HF的腐蚀剂中酸洗容易使薄壁不锈钢带力学性能降低,造成材料脆化,且HF含量越高对薄壁不锈钢力学性能影响越大。

Test Study on Corrosion of 0Cr18Ni9 Stainless Steel Thin-wall Product during Acid Pickling

In the process of acid pickling, 0Cr18Ni9 stainless steel thin-wall products are easily over-etched. The stainless steel strips with the thickness of 0.1mm were used to study the influencing factors of acid pickling. The test results are as follows:(a) 0Cr18Ni9 stainless steel in different status has different corrosion resistance. The annealed material is more likely to be over-etched. (b) The temperature of acid fluid, acid picking time, and concentration of acid fluid have a significant influence on the corrosion degree and mechanical property of stainless steel. (c) In the process of acid pickling, the etchant containing hydrofluoric acid lowers on the mechanical property of 0Cr18Ni9 stainless steel and causes material embrittlement during the acid pickling. (d) The higher the content of hydrofluoric acid is, the greater the influence on the mechanical property of 0Cr18Ni9 stainless steel is.