(1. 哈爾濱工程大學(xué)材料科學(xué)與化學(xué)工程學(xué)院表/界面科學(xué)與技術(shù)研究所，哈爾濱 150001；
2. 裝甲兵工程學(xué)院，裝備再制造技術(shù)國防科技重點(diǎn)實(shí)驗(yàn)室，北京 100072)
摘 要: 鎂/鋁合金表面轉(zhuǎn)化膜在成膜過程中由于存在劇烈的析氫反應(yīng)以及成膜結(jié)束后的失水收縮現(xiàn)象，導(dǎo)致該種轉(zhuǎn)化膜存在結(jié)構(gòu)疏松、連續(xù)性差、結(jié)合力低等缺點(diǎn)。從轉(zhuǎn)化膜成膜機(jī)制角度出發(fā)結(jié)合3種主要的失效現(xiàn)象(局部損傷、失水收縮致開裂以及結(jié)構(gòu)疏松導(dǎo)致的脫落)，對其失效機(jī)理進(jìn)行詳細(xì)闡述。同時(shí)基于這3種失效機(jī)理，簡明扼要地介紹目前針對這3個(gè)方面所采取的損傷修復(fù)、轉(zhuǎn)化膜致密化以及界面結(jié)合力增強(qiáng)方面轉(zhuǎn)化膜成膜工藝優(yōu)化的研究進(jìn)展，并對轉(zhuǎn)化膜后續(xù)發(fā)展進(jìn)行展望。
關(guān)鍵字: 成膜機(jī)制；損傷自修復(fù)；致密化；界面結(jié)合力
（1. Institute of Surface/Interface Science and Technology, School of Materials Science and Chemical Engineering,
Harbin Engineering University, Harbin 150001, China;
2. National Key Laboratory for Remanufacturing, Academy of Armored Forces Engineering, Beijing 100072, China）
Abstract:In the formation process of the conversion film on the surface of magnesium/aluminum alloy, severe hydrogen evolution reaction and water shrinkage at the end of the film formation, which leads toseveral disadvantages in the conversion coating such as loose structure, poor continuity andlow adhesive force. From the perspective of conversion coating film formation mechanism, combining with three kinds of failure phenomenon (partial damage, conversion coating cracking and loose structure), these three failure mechanisms were reviewed. And the progresses of formation process optimization of conversion coating film including self-healing, densification of conversion coating and enhancement of interface binding force were presented briefly. The development trend of conversion coating was also discussed.
Key words: film formation mechanism; damage self-healing; densification; interface bonding force
