Q235/Ni-Co基自修复涂层的制备和耐蚀性能  

Construction and Anti-corrosion Performance of a Selfhealing Coating on Ni-Co Plating/Q235 Carbon Steel

作　　者：段体岗[1] 黄国胜[1] 马力[1] 彭文山 张伟 许立坤[1] 林志峰[1] 何华 毕铁满 DUAN Tigang;HUANG Guosheng;MA Li;PENG Wenshan;ZHANG Wei;XU Likun;LIN Zhifeng;HE Hua;BI Tieman(State Key Laboratory for Marine Corrosion and Protection,Luoyang Ship Material Research Institute,Qingdao 266237,China;Center of Public Employment and Talent Service of Yantai,Yantai 264003,China;Dalian Shipbuilding Industry Co.,LTD,Dalian 116001,China)

机构地区：[1]中国船舶重工集团公司第七二五研究所,海洋腐蚀与防护重点实验室,青岛266237 [2]烟台市公共就业和人才服务中心,烟台264003 [3]大连船舶重工集团有限公司,大连116001

出　　处：《材料研究学报》2020年第10期777-783,共7页Chinese Journal of Materials Research

摘　　要：结合自修复微胶囊防腐涂层与合金镀层的优点,在Q235碳钢基体制备Ni-Co/Cap(T+Y)复合涂层以提高碳钢材料的耐侯性和服役周期。首先采用恒电流合金电镀法在Q235碳钢基体生成Ni-Co合金镀层,然后将以桐油和金属缓蚀剂做囊芯的双组份自修复胶囊均匀分散在醇酸树脂防腐涂层中制备有机防腐涂层,得到NiCo/Cap(T+Y)复合涂层。SEM观测和热重分析结果表明,合成的双组份自修复微胶囊的平均粒径约为3μm,囊芯包覆率达到49%。中性盐雾试验和微区电化学测试结果表明,经历380 h中性盐雾试验后复合防腐涂层只在划痕交点处出现轻微腐蚀,其他部位仍旧完整,没有出现鼓泡和腐蚀。以Ni-Co合金镀层与自修复涂层相结合的复合涂层,能长期保护Q235碳钢。Combining the advantages of organic coating with self-healing ability and alloy plating,a composite coating Cap(T+Y)/Ni-Co was prepared on the Q235 substrate in order to improve the anti-corrosion ability and extend the service time of the coated steel.At first the Ni-Co alloy plating was electrodeposited on Q235 carbon steel,and subsequently,the two-component microcapsules containing organic coating was applied on the Ni-Co/Q235 to acquire a composite coating.Results of SEM observation and thermogravimetry analysis show that the diameter of microcapsules is about 3μm with a coverage up to49%.Besides,results of neutral salt spray tests and localized electrochemical tests show that the composite coating presents a well integrality after undergoing 380 h salt spray test.The anticorrosive composite coating has satisfactory self-healing activity and long-term protectiveness on the Q235 metal matrixes.

关 键 词：材料失效与保护 自修复涂层 微胶囊 Ni-Co合金电镀 

分 类 号：O648[理学—物理化学]