苯并三氮唑对BFe30-1-1在单相及含沙人工海水中冲刷腐蚀的抑制作用*

采用旋转圆筒式冲刷认错装置通过多种电化学测试及失重测量研究了苯并三氮唑（BTA）对BFe30-1-1在单相及含砂人工海水中冲刷腐蚀的抑制作用。结果表明，BTA可有效抑制BFe30-1-1在单相及含砂人工海水中冲刷腐蚀的阴、阳极反应，属几何覆盖型缓蚀剂，其吸附满足Langmiur等温式；BTA在单相流动海水中比静态下缓蚀作用更强，但流速较高时，BTA缓蚀作用下降；在含砂人工海水中，BTA缓蚀作用随砂含量的增加而降低。

EFFECT OF BTA ON EROSION-CORROSION INHIBITION OF BFe30-1-1 IN SINGLE AND SAND-CONTAINING ARTIFIBIAL SEAWATER

The inhibition of BTA from erosion-corrosion of BFe30-1-1 in single and sand-containing artificial seawater have been investigated using rotating cylinger apparatus.The methods adopted in the experiments were weight loss and electrochemical measurements insluding linear polarization resistance and potentiodynamic scanning as well as electrochenical inpedance spectroscopy..The results showed that BTA could significantly retarede both the anodic and cathodic reactions of BFe30-1-1 in the media by geometric blocking effect.The adsorption of BTA on the alloy followed Langmiur isotherm.BTA showed better ingibition action in flowing seawater than in static seawater.however,the ingibiting action of BTA decreased then the fluid velocity of artificial seawater was even higher.Furthrmore,the ingibition efficiency of BTA in sand-containing artificial seawater decreased with increasing sand content probably due to the strong mechanical erosion action of sand against electrode surface.