CAJ | 학술논문

对传统镁合金化学镀工艺进行改进，分析“零污水排放”化学镀镍新工艺的沉积机制。并以316L 不锈钢作为对比材料，研究该化学镀镍层的耐蚀性能。结果表明：新工艺获得的 Ni-P 镀层具有非晶结构，且组织均匀致密；在20%H2SO4溶液中，镀态和经200℃热处理的镀层的耐蚀性均优于316L不锈钢的；Ni-P镀层与316L不锈钢在20%H2SO4溶液中的动电位极化曲线对比表明，Ni-P镀层具有更正的腐蚀电位，可对AZ91D镁合金起到有效的保护作用。氟化镁转化膜在镀液中是稳定的，化学镀后与镀镍层和镁合金基体间的界面结合良好。
대전통미합금화학도공예진행개진，분석“령오수배방”화학도얼신공예적침적궤제。병이316L 불수강작위대비재료，연구해화학도얼층적내식성능。결과표명：신공예획득적 Ni-P 도층구유비정결구，차조직균균치밀；재20%H2SO4용액중，도태화경200℃열처리적도층적내식성균우우316L불수강적；Ni-P도층여316L불수강재20%H2SO4용액중적동전위겁화곡선대비표명，Ni-P도층구유경정적부식전위，가대AZ91D미합금기도유효적보호작용。불화미전화막재도액중시은정적，화학도후여도얼층화미합금기체간적계면결합량호。
Traditional process of electroless Ni-P plating on AZ91D magnesium alloy was improved, and the deposition mechanism of a new wastewater-free electroless nickel plating was investigated. Meantime, the corrosion resistance of the Ni-P coating was studied using stainless steel 316L as contrast material. The results show that the Ni-P coating prepared with the new process is amorphous, and its microstructure is compact and uniform. The corrosion resistance of both as-plated and heat-treated Ni-P coating at 200℃is superior to that of stainless steel 316L in 20%H2SO4 solution. The potentiodynamic polarization curves in 20%H2SO4 solution indicate that the Ni-P coating has more positive corrosion potential than that of stainless steel 316L, and can provide good protection to magnesium alloy substrate. The MgF2 conversion film on the surface of magnesium alloy is stable in the bath. Good interface coherences, both in Ni-P coating-MgF2 film and in magnesium alloy matrix-MgF2 film, are formed.