An electroless ternary Ni-Sn-P transition layer with high corrosion resistance was applied for acid electroless nickel plating on magnesium alloys. The surface morphologies and microstructure of the traditional alkali...An electroless ternary Ni-Sn-P transition layer with high corrosion resistance was applied for acid electroless nickel plating on magnesium alloys. The surface morphologies and microstructure of the traditional alkaline electroless Ni-P and novel Ni-Sn-P transition layers were compared by SEM and XRD, and the bonding strengths between the transition layers and AZ31 magnesium alloys were tested. The corrosion resistance of the samples was analyzed by porosity test, potentiodynamic polarization, electrochemical impedance spectroscopy（EIS） in acid electroless solution at p H 4.5 and immersion test in 10% HCl. The results indicate that the transition layer is essential for acid electroless plating Ni-P coatings on magnesium alloys. Under the same thin thickness（-6 μm）, the electroless Ni-Sn-P transition layer possesses superior properties to the traditional Ni-P transition layer, including high amorphization, smooth and dense surface without pores, enhanced bonding strength and corrosion resistance. Most importantly, acid electroless Ni-P coatings can be successfully deposited on magnesium alloys by using Ni-Sn-P transition layer.展开更多
钢铁表面浸镀Cu Sn P合金,得到金黄色仿金镀层 在金黄色镀层上化学镀法Ni Sn P合金,形成Cu Sn P/Ni Sn P合金复合镀层,确定了镀液的最佳组成和工艺,用盐水浸泡测定复合镀层的防腐蚀性,用SEM,XPS和AES谱分析镀层的表面形貌、组成、结构...钢铁表面浸镀Cu Sn P合金,得到金黄色仿金镀层 在金黄色镀层上化学镀法Ni Sn P合金,形成Cu Sn P/Ni Sn P合金复合镀层,确定了镀液的最佳组成和工艺,用盐水浸泡测定复合镀层的防腐蚀性,用SEM,XPS和AES谱分析镀层的表面形貌、组成、结构和性能 结果表明,合金复合镀层使钢铁耐腐蚀性得以改善,Cu Sn P镀层可表示为Cu Sn P/CuxOy/SnxOy;Ni Sn P镀层可表示为Ni Sn P/NixOy/SnxOy,各元素的相对原子百分浓度分别为Ni52 2%,O6 9%,Sn18 7%,P12 9%,Fe9 3%展开更多
基金Project(20120407)supported by the Science and Technology Key Development Plan of Jilin Province,China
文摘An electroless ternary Ni-Sn-P transition layer with high corrosion resistance was applied for acid electroless nickel plating on magnesium alloys. The surface morphologies and microstructure of the traditional alkaline electroless Ni-P and novel Ni-Sn-P transition layers were compared by SEM and XRD, and the bonding strengths between the transition layers and AZ31 magnesium alloys were tested. The corrosion resistance of the samples was analyzed by porosity test, potentiodynamic polarization, electrochemical impedance spectroscopy（EIS） in acid electroless solution at p H 4.5 and immersion test in 10% HCl. The results indicate that the transition layer is essential for acid electroless plating Ni-P coatings on magnesium alloys. Under the same thin thickness（-6 μm）, the electroless Ni-Sn-P transition layer possesses superior properties to the traditional Ni-P transition layer, including high amorphization, smooth and dense surface without pores, enhanced bonding strength and corrosion resistance. Most importantly, acid electroless Ni-P coatings can be successfully deposited on magnesium alloys by using Ni-Sn-P transition layer.
文摘钢铁表面浸镀Cu Sn P合金,得到金黄色仿金镀层 在金黄色镀层上化学镀法Ni Sn P合金,形成Cu Sn P/Ni Sn P合金复合镀层,确定了镀液的最佳组成和工艺,用盐水浸泡测定复合镀层的防腐蚀性,用SEM,XPS和AES谱分析镀层的表面形貌、组成、结构和性能 结果表明,合金复合镀层使钢铁耐腐蚀性得以改善,Cu Sn P镀层可表示为Cu Sn P/CuxOy/SnxOy;Ni Sn P镀层可表示为Ni Sn P/NixOy/SnxOy,各元素的相对原子百分浓度分别为Ni52 2%,O6 9%,Sn18 7%,P12 9%,Fe9 3%
