高氯环境下钢结构涂层防腐蚀技术创新研究  

Creative research on anti-corrosion technology of steel structure in high chlorine environment

作　　者：史魏 杨阳[2] 高青山 SHI Wei;YANG Yang;GAO Qingshan(Suzhou University of Science and Technology,Suzhou 225300,Jiangsu China;Shenyang Jianzhu University,Shenyang 121000,China;Harbin University of Science and Technology,Harbin 036000,China)

机构地区：[1]苏州科技大学,江苏苏州225300 [2]沈阳建筑大学,辽宁沈阳121000 [3]哈尔滨理工大学,黑龙江哈尔滨036000

出　　处：《粘接》2023年第10期118-121,共4页Adhesion

基　　金：中国建筑第七工程局课题(项目编号:CSCEC7b-2022-Z-21)。

摘　　要：针对传统Zn-15Al钢结构合金防腐涂层在恶劣服役条件下耐腐蚀性能减弱,服役寿命降低的问题,提出一种新型Zn-50Al合金材料的制备,并对新型合金材料的耐蚀性能和机理进行分析。试验结果表明:新型Zn-50Al合金涂层颜色光亮,表面光滑平整,没有明显缺陷存在,孔隙率和结合强度分别为10%和5.8 MPa,可与钢结构基质紧密结合。经过70 d长时间腐蚀后,虽然有腐蚀物出现,但仍旧具备一定的耐腐蚀能力。其耐腐蚀机理为,新型Zn-50Al合金涂层结构均匀,经过腐蚀后,得到结构致密的氢氧化铝,自腐蚀电流和折算系数均明显低于传统Zn-15Al合金涂层,具备较好的耐腐蚀性。Aiming at the problem that the corrosion resistance and service life of the traditional Zn-15Al steel structure alloy anti-corrosion coating are weakened under severe service conditions,a new type of Zn-50Al alloy material is prepared,and the corrosion resistance and mechanism of the new alloy material are analyzed.The test results show that the new Zn-50Al alloy coating has bright color,smooth and flat surface,no obvious defects,porosity and bonding strength of 10% and 5.8MPa,respectively,and can be closely combined with the steel structure matrix.After 70 days of corrosion,although there are corrosives,it still has a certain corrosion resistance.The corrosion mechanism is that the new Zn-50Al alloy coating has a uniform structure.After corrosion,aluminum hydroxide with dense structure is obtained.The self corrosion current and conversion coefficient are significantly lower than those of the traditional Zn-15Al alloy coating,which has good corrosion resistance.

关 键 词：钢结构防腐 耐蚀性能 合金涂层 耐蚀机理 

分 类 号：TQ153.2[化学工程—电化学工业]