(中國石油大學(華東) 新能源學院，過程裝備與控制工程系，青島 266580)
摘 要: 高性能鋁、鎂合金是典型高比剛度和比強度的輕質(zhì)結(jié)構(gòu)材料，而鋁鎂自身化學活性高，其結(jié)構(gòu)件在腐蝕環(huán)境中易點蝕失效，嚴重影響輕質(zhì)裝備的長周期安全服役。因此，簡單經(jīng)濟且高效耐蝕的表面轉(zhuǎn)化膜處理技術(shù)備受青睞。本文從轉(zhuǎn)化膜基本概念和分類出發(fā)，詳細介紹了三價鉻轉(zhuǎn)化膜成膜機理和影響因素，重點評述了三價鉻轉(zhuǎn)化膜耐蝕性能和鉻酸鹽價態(tài)的影響因素，并總結(jié)了三價鉻轉(zhuǎn)化膜工藝發(fā)展的重要成果和存在問題，展望了其未來的發(fā)展趨勢和研究熱點。
關(guān)鍵字: 輕合金；三價鉻；表面處理；轉(zhuǎn)化膜；影響因素
（Department of Process Equipment and Control Engineering, College of New Energy, China University of Petroleum (East China), Qingdao 266580, China）
Abstract:High-quality aluminium and magnesium alloys are the typical light-weight materials with high values of specific strength and stiffness. However, the active chemistry of aluminium and magnesium leads to the high sensitiveness to the pitting corrosion and failure in the corrosive environments, threatening the long-term and safe operation and service of such equipment. In this sense, the economic and effective corrosion-protection conversion treatment technology is welcome in the industries. The present paper introduced the basic concept of conversion coating and its types simply, and then the formation mechanism and influencing factors of trivalent chromium conversion coatings in detail. The corrosion protection performance, chromium valence change and influencing factors were commentated specifically. The outstanding output and present questions of the TCP development were summarized. Finally, the future development and research hotspots were expected.
Key words: light alloy; trivalent chromium; surface treatment; conversion coating; influencing factors
