(北京科技大學 表面科學與腐蝕工程系，北京 100083)
摘 要: 通過采用極化阻力測量、中性鹽霧試驗和SEM，XRD，XPS等手段研究了含Ti(Ⅳ)低鉻鈍化膜的耐蝕性、組成與結(jié)構(gòu)，探討了鈦離子對鈍化膜防護機理的影響。結(jié)果表明，膜內(nèi)Ti(Ⅳ)離子可以有效地提高鍍鋅低鉻鈍化膜的抗白銹能力，這是由于膜內(nèi)Ti(Ⅳ)離子的摻雜效應(yīng)和Ti(Ⅳ)化合物水解再沉積作用所致。
關(guān)鍵字: Ti(Ⅳ)化合物； 鉻酸鹽； 耐蝕性； 轉(zhuǎn)化膜
（Department of Corrosion Engineering, University of Science and Technology Beijing,
Beijing 100083, P.R.China）
Abstract:The corrosion resistance, composition and structure of Ti(Ⅳ) compound modified passive films formed in low concentration of chromate solution were studied by means of polarization resistance measuring, neutral salt spray test and SEM, XRD, XPS, and the effect of Ti(Ⅳ) ion on the protective mechanism of low-chromate passive film was also discussed. The experimental results show that the Ti(Ⅳ) ions in the passive film can effectively improve the white rust-inhibitive capacity of low chromate passive film, and it is caused by adulteration effect of Ti(Ⅳ)ions and hydrolysis redeposition effect of Ti(Ⅳ)compound in the passive film.
Key words: Ti(Ⅳ) compound； chromate; corrosion resistance; conversion coating
