【摘 要】
：
Electroless nickel(EN)plating can give rise to the severe galvanic corrosion of the magnesium(Mg) alloy matrix,owing to its nobler electrochemical potential than Mg alloy. To hinder the formation of galvanic couple, an intermediate phosphate conversion co
【机 构】
：
Shenyang National Laboratory for Materials Science,Northeastern University,Shenyang 110819,Liaoning,
论文部分内容阅读
Electroless nickel(EN)plating can give rise to the severe galvanic corrosion of the magnesium(Mg) alloy matrix,owing to its nobler electrochemical potential than Mg alloy. To hinder the formation of galvanic couple, an intermediate phosphate conversion coating (PCC) layer is introduced between the EN layer and the Mg alloy matrix. Since the ceramic-like PCC layer cannot be catalyzed,a low-cost Ag-activation technique is used to process the PCC layer before electroless plating. The cross-section morphology and element distribution of the PCC-EN composite coating indicate that the PCC intermediate layer can effectively separate the Mg alloy from the EN layer. Moreover, the results of electrochemical tests suggest that the PCC-EN composite coating has a better corrosion resistance in comparison with the EN coating and AZ91D Mg alloy.
其他文献
介绍了酚醛树脂的发展历史和现状,主要从纳米材料、环氧树脂等改性酚醛塑料,酚醛泡沫的合成与改性,新型酚醛树脂——苯并噁嗪的合成和改性等方面进行了讨论.此外,对酚醛树脂未来的发展方向进行了预估和展望.
2021年12月29日,上海石化在芳樟醇装置举行危化品公路运输事故应急处置演练,以检验各单位之间应对突发事故的协同处置能力,进一步提升公司各单位应对突发事故的能力.
2021年12月15日,在国家禁毒委员会办公室、上海市禁毒委员会指导下,上海研究院、上海市禁毒委员会办公室、国际禁毒政策研究中心与社会科学文献出版社共同发布《国际禁毒蓝皮书:国际禁毒研究报告(2021)》(简称《国际禁毒蓝皮书(2021)》).
Using Gleeble-3500 thermal simulator, the high temperature plastic deformation behavior and microstructure evolution of Mg-9Al-3Si-0.375Sr-0.78Y alloy are investigated at the temperature of 523 K?673 K and the strain rate of 10?3 s?1?10 s?1. True strain-t
上海华谊(集团)公司总裁王霞荣获“2019-2020年度上海市优秀企业家”称号.rn上海市副市长张为代表上海市政府,向获奖的优秀企业家表示热烈祝贺.张为对企业家提出三点要求:一是要胸怀大局抢抓机遇,加快打造世界影响力的一流企业.
2021年年底,在江苏连云港举行的圣奥化学-霍尼韦尔低碳新技术交流会上,圣奥化学科技有限公司(简称“圣奥化学”)正式发布“迈向蔚蓝”低碳商业模式转型行动计划,通过优化产品结构、优化集成节能减排技术、加强能源管理、使用清洁能源四大行动,实现国家“碳达峰”、“碳中和”与“能源消费强度和总量控制”目标.
2021年12月24日,金山第二工业区举办安全生产专家聘任座谈会.金山第二工业区聘请安全生产领域13名资深教授、学者、技师为该园区首批安全专家,并向专家颁发了聘书.会议还通报了金山第二工业区安全生产专家组聘任管理办法,由园区推荐,经专家组成员表决,选定杨沈嵘和汪忠辉分别担任专家组长.两位专家组长分别作了交流发言.
The effects of isothermal heat treatment on the semi-solid microstructure evolution of VW63Z(Mg-6Gd-3Y-0.4Zr,wt.％) alloy are studied. It shows that the microstructure of VW63Z alloy could transform from equiaxed crystal to semi-solid spherical crystal aft
The plastic deformation behavior of new Mg-Gd-Y-Zn-Mn magnesium alloys gains great necessity to clarify and understand the mechanism deeply. In the present work,the tensile mechanical property test and visco-plastic self-consistent(VPSC)model are used to
Pure Al and Al-30％ Al2O3 composite coatings are prepared on the surface of AZ31B magnesium alloy by low-pressure cold spraying. The morphology and structure of the coatings are analyzed by scanning electron microscope(SEM),energy dispersive spectroscopy(E