电镀与涂饰
電鍍與塗飾
전도여도식
ELECTROPLATING & FINISHING
2011年
3期
31-34
,共4页
化学镀%镍磷合金%硫酸钡%复合镀层%耐蚀性%显微硬度%耐磨性
化學鍍%鎳燐閤金%硫痠鋇%複閤鍍層%耐蝕性%顯微硬度%耐磨性
화학도%얼린합금%류산패%복합도층%내식성%현미경도%내마성
electroless plating%nickel-phosphorus alloy%barium sulfate%composite coating%corrosion resistance%microhardness%wear resistance
在由硫酸镍31g/L、次磷酸钠22g/L、乙醇酸30g/L、乙酸钠13g/L、二甲胺0.8g/L、全氟乙基碘化铵0.1g/L及重晶石(即硫酸钡)0～25g/L组成的稳定镀液中,采用化学镀的方法在低碳钢上制备了Ni-P-BaSO4复合镀层.其表面形貌采用扫描电镜进行分析,耐蚀性以动电位极化及电化学阻抗谱测试.镍-磷合金基体中掺入硫酸钡,提高了化学镀层的显微硬度.相对于纯Ni-P 合金镀层,Ni-P-BaSO4复合镀层具有更小的磨损率.硫酸钡颗粒的存在使得复合镀层的耐蚀性明显降低.
在由硫痠鎳31g/L、次燐痠鈉22g/L、乙醇痠30g/L、乙痠鈉13g/L、二甲胺0.8g/L、全氟乙基碘化銨0.1g/L及重晶石(即硫痠鋇)0～25g/L組成的穩定鍍液中,採用化學鍍的方法在低碳鋼上製備瞭Ni-P-BaSO4複閤鍍層.其錶麵形貌採用掃描電鏡進行分析,耐蝕性以動電位極化及電化學阻抗譜測試.鎳-燐閤金基體中摻入硫痠鋇,提高瞭化學鍍層的顯微硬度.相對于純Ni-P 閤金鍍層,Ni-P-BaSO4複閤鍍層具有更小的磨損率.硫痠鋇顆粒的存在使得複閤鍍層的耐蝕性明顯降低.
재유류산얼31g/L、차린산납22g/L、을순산30g/L、을산납13g/L、이갑알0.8g/L、전불을기전화안0.1g/L급중정석(즉류산패)0～25g/L조성적은정도액중,채용화학도적방법재저탄강상제비료Ni-P-BaSO4복합도층.기표면형모채용소묘전경진행분석,내식성이동전위겁화급전화학조항보측시.얼-린합금기체중참입류산패,제고료화학도층적현미경도.상대우순Ni-P 합금도층,Ni-P-BaSO4복합도층구유경소적마손솔.류산패과립적존재사득복합도층적내식성명현강저.
Ni-P-BaSO4 composite coatings were prepared on mild steel by electroless plating from a stable bath containing nickel sulfate 31 g/L, sodium hypophosphite 22 g/L, glycolic acid 30 g/L,sodium acetate 13 g/L,dimethylamine 0.8 g/L,perfluoroethyl ammonium iodide 0.1 g/L, and barite (BaS0O4) particles 0-25 g/L. The surface morphology of the composite coatings was analyzed by SEM,and the corrosion resistance by potentiodynamic polarization and electrochemical impedance spectroscopy. The incorporation of BaSO4 into Ni-P alloy matrix increases the microhardness of the electroless coatings. Ni-P-BaSO4 composite coating exhibits a distinctly small wear rate as compared with pure Ni-P alloy coating. The presence of barite particles in the deposit significantly reduces the corrosion resistance of the composite coatings.
