材料期刊网

采用直流电弧喷涂和火焰喷涂技术，在碳钢管表面沉积了１２种类的Ｚｎ、Ａｌ和Ｚｎ－１３Ａ１涂层在日本的千仓海岸进行海水腐蚀实验，结果表明，在５年暴露期内，所有的涂层均没有发生明显的腐蚀；经７年暴露后，未经封闭和经封闭处理的Ｚｎ涂层在浸泡区出现严重的锈蚀，电弧喷涂并经封孔处理的Ａ１涂层，火焰喷涂并经封孔处理的Ｚｎ－Ａ１涂层和火焰涂并经重涂装的Ａ１涂层显示出优良的耐蚀性能，相比之下，未经封闭处理的火焰喷涂　

Thermal spray amnittee of Japan Association of Comion Conml (JACC) has been conducting a comion test of thermal sprayed Zn, Al and Zn-Al coatings in coastal area since 1985, this paper surranarizes experimental data of 10 year exposure. 12 kinds of Zn, Al and Zn-13Al coatings were deposited on steel pipes by DC arc-spraying and flame-spraying in varied thickness, and 7 lunds of them were subjected to various sealing and heavy painting post-treatment. The comion performance of the coated steel pipes were inspected annually by recording the apperance and coating thickness in sea air, splash and tidal zones. For 5 year exposure, no significant changes were observed for all the coatings, but Zn coatings with or without sealing suffered rust comion in the tidal zone after 7 year exposure. Arc-sprayed Al with sealing, flame sprayed Zn-Al with sealing and flame sprayed Al with heavy painting showed excellent rust resistance while flame sprayed Zn or Al without sealing all& the cormsion of steel pipes resulting in heavy rusting.