硅烷封孔处理对6063铝合金微弧氧化膜腐蚀行为的影响  

Effect of silane sealing treatment on corrosion behavior of 6063 aluminum alloy micro-arc oxidation coatings

作　　者：龙武 刘斌[1,2,3] 郭玉洁[1,2] 李芳[1,2] 张江江 曾文广[1,2] LONG Wu;LIU Bin;GUO Yu-jie;LI Fang;ZHANG Jiang-jiang;ZENG Wen-guang(Key Laboratory of Enhanced Oil Recovery in Carbonate Fractured-vuggy Reservoirs(SINOPEC),Urumqi 830011,China;SINOPEC Northwest China Petroleum Bureau,Urumqi 830011hina;School of Mechanical Engineering,Xinjiang University,Urumqi 830046,China)

机构地区：[1]中国石油化工集团公司碳酸盐岩缝洞型油藏提高采收率重点实验室,新疆乌鲁木齐830011 [2]中国石油化工股份有限公司西北油田分公司,新疆乌鲁木齐830011 [3]新疆大学机械工程学院,新疆乌鲁木齐830046

出　　处：《轻合金加工技术》2022年第6期53-59,67,共8页Light Alloy Fabrication Technology

摘　　要：采用SEM及EDS对6063铝合金微弧氧化膜进行截面、结构表面形貌与成分分析,利用动电位极化曲线和盐雾试验研究其耐蚀性能。结果表明:硅酸钠电解液体系制备的6063铝合金微弧氧化膜呈现多孔和显微裂纹的结构特点,破坏了微弧氧化膜的完整性,导致其耐腐蚀性能不佳。利用硅烷与铝合金表面微弧氧化膜发生化学键合进行封孔的同时,在其表面形成致密的保护膜,从而极大地提高了6063铝合金的微弧氧化膜的耐腐蚀性能。采用质量分数为5%的KH560硅烷水解溶液封孔处理后的微弧氧化旋风转子经过1 872 h的中性盐雾试验,膜层结构仍然保持完整,没有出现腐蚀和膜层崩溃失效的现象,说明使用该硅烷水解溶液封孔处理对微弧氧化膜的孔洞和显微裂纹具有良好的封孔效果。For the micro-arc oxidation coating on 6063 aluminum alloy, the section, structure surface morphology and composition were analyzed with SEM and EDS,and the corrosion resistance was evaluated with the potentiodynamic polarization curve and the salt spray test.The results show that the micro-arc oxide coating prepared by sodium silicate electrolytic liquid has the structure characteristics of multi-holes and microcracks, which destroys the integrity of the micro-arc oxide coating and leads to poor corrosion resistance. The corrosion resistance of micro-arc oxidation coating on 6063 aluminum alloy can be greatly improved by using silane and micro-arc oxidation coating on aluminum alloy surface to seal the hole and form a dense protective coating on its surface. After 5% KH560 silanization, the micro-arc oxidation structure of the cyclone rotor was tested by neutral salt spray for 1 872 h, and the coating structure remained intact without corrosion or coating collapse failure, indicating that 5% KH560 silane treatment achieved a good sealing effect on the multi-holes and micro-cracks of the micro-arc oxidation coating.

关 键 词：6063铝合金 微弧氧化 硅烷 封孔处理 耐蚀性能 

分 类 号：TG17.4[金属学及工艺—金属表面处理]