不锈钢在硝酸-氢氟酸中酸洗缓蚀抑雾剂的筛选

Screening of Corrosion and Acid Fog Inhibitor in Nitrate Acid and Hydrofluoric Acid for Stainless Steels

采用线性极化技术对18-8不锈钢在8%HNO3+2%HF酸洗介质中的缓蚀抑雾剂进行筛选，经正交试验，得出最佳配方的组成为0.3%硫脲衍生物+0.2%乌洛托品+0.3%硫氰酸铵+0.2%十二烷基苯磺酸钠，缓蚀率达到99%，抑雾率达到85%左右，该最佳配方的缓蚀抑雾剂对材料的力学性能不产生影响。

The corrosion and acid fog inhibitor for 18-8stainless steel in 8%HNO3 and 2%HF is screened by line polarization technique. An optimum formulation is determined by orthogonal test. The corrosion inhibition efficiency reaches 99% and acid fog inhibition efficiency reaches 85% when the mixing acid consisted of 0.3%thiourea derivative +0.2%methenamine+0.3%ammonium thiocyanate +0.2% sodium dodecyl benzene sulfonate (SDBS). the mixing acid never harms the strength of the stainless steels.