萬 曄1， 曹楚南1
(1. 中國科學(xué)院 金屬研究所 金屬腐蝕與防護
國家重點實驗室，沈陽 110016；
2. 云南大學(xué) 化學(xué)系， 昆明 650091;
3. 遼寧大學(xué) 化學(xué)科學(xué)與工程學(xué)院， 沈陽 110036)
摘 要: 用石英晶體微天平研究了溫度為25℃、 相對濕度為90%條件下， NaCl和SO2的協(xié)同效應(yīng)對Zn初期大氣腐蝕行為的影響; 對該條件下Zn的初期大氣腐蝕動力學(xué)進行了分析。 結(jié)果表明， NaCl和SO2的協(xié)同效應(yīng)導(dǎo)致腐蝕加劇， 腐蝕增量大于兩者各自單獨存在時引起的腐蝕。同時應(yīng)用X射線衍射儀及Fourier變換紅外光譜儀對Zn表面腐蝕產(chǎn)物進行了分析。 探討了Zn在NaCl和SO2協(xié)同效應(yīng)影響下的腐蝕機理。
關(guān)鍵字: Zn; 初期大氣腐蝕; 協(xié)同效應(yīng)； NaCl; SO2
YAN Yi-gong1, WAN Ye1, CAO Chu-nan1
（1. State Key Laboratory for Corrosion and Protection,
Institute of Metal Research,
The Chinese Academy of Sciences,Shenyang 110016, China;
2. Department of Chemistry, Yunnan University, Kunming 650091, China;
3. School of Chemical Science and Engineering, Liaoning University,
Shenyang 110036, China）
Abstract: The influence of NaCl and SO2 on the initial atmospheric corrosion of Zn at 25℃ and 90%RH was investigated by means of quartz crystal microbalance (QCM) . NaCl and SO2 can obviously accelerate the initial corrosion of Zn respectively. The combined effect of NaCl and SO2 on the corrosion of Zn is greater than that caused by each single component. Fourier transform infrared spectroscopy (FTIR) and X-ray diffraction were used to characterize the corrosion products of Zn. A probable mechanism is presented to explain the experimental observations.
Key words: Zn; initial atmospheric corrosion; synergism; NaCl; SO2
