CAJ | 학술논문

首先,将预处理后的合金样品在碱式碳酸镍溶液中进行预镀,目的是在镁锂合金表面形成一层Ni-P合金薄膜；然后,在硫酸镍溶液中进行二次镀覆,获得具有保护作用的镀层.对获得的镀层的表面形貌、结构和抗腐蚀能力进行研究.结果表明:采用该方法能够在镁锂合金表面形成平整、光亮、致密的镀层,镀层与基体结合良好.镀层中磷含量达到13.56％(质量分数),镀层的维氏硬度约为HV549.极化曲线测试表明,Ni-P镀层的腐蚀电位升高至-0.249 V(vs SCE),并有一个很宽的钝化区,这种现象显示该镀层具有良好的抗腐蚀能力.
수선,장예처리후적합금양품재감식탄산얼용액중진행예도,목적시재미리합금표면형성일층Ni-P합금박막；연후,재류산얼용액중진행이차도복,획득구유보호작용적도층.대획득적도층적표면형모、결구화항부식능력진행연구.결과표명:채용해방법능구재미리합금표면형성평정、광량、치밀적도층,도층여기체결합량호.도층중린함량체도13.56％(질량분수),도층적유씨경도약위HV549.겁화곡선측시표명,Ni-P도층적부식전위승고지-0.249 V(vs SCE),병유일개흔관적둔화구,저충현상현시해도층구유량호적항부식능력.
Pretreated Mg-Li alloy sheets were pre-plated in a NiCO3·2Ni(OH)2·4H2O solution to form a thin Ni-P alloy film and then plating in a NiSO4·6H2O solution was carried out to obtain a protective coating.The surface morphology,structure and corrosion resistance of the coating were studied.The results showed that a flat,bright and compact plating layer,which was integrated into the matrix metal,was obtained.The P content of the Ni-P coating reached 13.56％ (mass fraction).The hardness value of the Ni-P coating was about HV 549.The polarization curve showed that the corrosion potential of the Ni-P coating reached -0.249 V (vs SCE).A long passivation region was fotmd on the polarization curve,and this phenomenon indicated that the coating has an excellent anti-corrosion property.