中温酸性化学镀Ni-P合金耐蚀性能研究  

Study on Corrosion Resistance of Electroless Ni-P Alloy in the Acidic Solution at Middle Temperature

作　　者：亢淑梅[1] 王琳[1] 李成威[1] 陈华[2] 

机构地区：[1]辽宁科技大学材料学院,辽宁鞍山114051 [2]鞍钢股份公司中厚板厂,辽宁鞍山114021

出　　处：《表面技术》2008年第3期27-29,共3页Surface Technology

摘　　要：为提高化学镀N i-P合金耐蚀性能,以Q235钢为待镀基体,在中温的酸性条件下,采用正交试验方法得到镀层耐蚀性最佳的工艺条件为:镀液pH值5.2;N i2+与H2PO2-的摩尔比为0.48;复合络合剂乳酸15mL/L+丙酸5mL/L;加速剂NaF 0.4g/L;热处理温度500℃。在此条件下,腐蚀电流为2.166×10-5A,可较好地提高镀层耐蚀性。To improve the corrosion resistance of electroless Ni-P alloy, used Q235 steel as substrates, the effect of process parameters on the corrosion resistance of the nickel-plating was studied in the acidic solution at middle temperature by the orthogonal experimental method. By the range analysis, the best conditions were determined：process for the best prescription： molar ratio of Ni^2＋ and H2PO2 - is 0.48; compound complexing agent of lactic acid is 15mL/L; propionic acid is 5mL/L; accelerator NaF is 0.4 g/L; Stabilizer thiourea is 1 mg/L; buffer sodium acetate is 16.5g/L; surfactants lauryl sodium sulfonate is 10mg/L; pH value 5.2; plating time is 2h; heat treatment temperature is 500℃. On the condition, the corrosion current is 2. 166 × 10^-5 A and the corrosion resistance is improved.

关 键 词：化学镀 Ni—P合金 耐蚀性 热处理 

分 类 号：TG174.4[金属学及工艺—金属表面处理]