摘要
采用恒电流极化、线性极化和表面分析技术研究了Q235钢在低温低溶解氧流动海水中阴极保护初期钙质层的形成情况。结果表明,在低温低氧流动条件下150～800mA/m^2极化电流密度都可以达到Q235钢的最低保护电位,但钙质层难以形成,要得到致密良好的钙质层需要在阴极保护初期提高极化电流密度。低温低氧条件下钙质层的主要成分是CaCO_3,Mg(OH)_2形成不明显。
Calcareous deposits of Q235 steel under initial CP in low temperature and low dissolved oxygen content in dynamic seawater was studied using galvanostatic control, liner polarization resistanceand surface analysis techniques. The results showed that it could achieve the lowest protection potential when current density was 150mA/m^2 to 800mA/m^2, but the calcareous deposits formed difficulty, higher polarization current density was needed to obtain the compact nicer calcareous deposits. Under the low temperature and low dissolved ox- ygen content environment, the pricipal calcareous layer constituent is CaCO3, Mg（OH）2 and does not form obviously.
出处
《海洋湖沼通报》
CSCD
北大核心
2011年第2期137-141,共5页
Transactions of Oceanology and Limnology
关键词
钙质层
低温
低溶解氧
阴极保护
恒流极化
calcareous deposit
low temperature
low dissolved oxygen content
cathodic protection
galvanostatic control
