(1. 蘭州理工大學(xué) 有色金屬新材料國(guó)家重點(diǎn)實(shí)驗(yàn)室, 蘭州 730050;
2. 甘肅省水利水電工程局, 蘭州 730000)
摘 要: 通過靜態(tài)浸泡腐蝕實(shí)驗(yàn)、 電化學(xué)實(shí)驗(yàn)、 X射線衍射分析、 掃描電鏡、 電子能譜儀、 電子探針等方法研究高鋁青銅合金Cu-14Al-X在3.5%NaCl(質(zhì)量分?jǐn)?shù))溶液中的耐蝕性能及腐蝕行為。 結(jié)果表明: 在NaCl溶液中, Cu-14Al-X合金具有良好的耐蝕性能, 合金中的(α+γ2)共析體和β′ 相、 α相、 K相相比, 具有優(yōu)先腐蝕傾向, 合金發(fā)生的主要是脫鋁腐蝕。 腐蝕鈍化膜的形成及熱處理后合金各相成分趨于一致, 均使合金耐腐蝕性能得到改善。
關(guān)鍵字: 鋁青銅; 腐蝕; 耐蝕性能; 腐蝕速率; 脫鋁
XU Jian-lin1, WEI Di-sheng2
( 1. State Key Laboratory of Advanced Nonferrous Materials,
Lanzhou University of Technology, Lanzhou 730050, China;
2. Gansu Province Conservancy and Hydro-power Engineering Bureau,
Lanzhou 730000, China)
Abstract: The corrosion resistance and behavior of Cu-14Al-X bronze in 3.5%NaCl (mass fraction) solution was investigated by using static immersing corrosion and electrochemistry test, X-ray diffractrometry, scanning electron microscope, energy dispersive spectrometer and electron probe micro-analyzer. The results indicate that the corrosion resistance of Cu-14Al-X is perfect in 3.5%NaCl solution. (α+γ2) phase suffers a dealuminization attack superior to β′ phase, α phase and K phase, the high Al-bronze suffers dealuminization corrosion. And the passivation patinas and the composition of each phases becoming more homogeneous are moderator to corrosion.
Key words: aluminum bronze; corrosion; corrosion resistance; corrosion rate; dealuminization


