304L-BTC330R钢偶对在模拟自来水中的电偶腐蚀

Galvanic Corrosion of 304L-BTC330R Steel Galvanic Pair in Simulated Tap Water

通过电化学测量技术和表面分析技术,分析了不同偶对面积比、溶液温度、溶液电导率条件下304L-BTC330R钢偶对在模拟自来水中的电偶腐蚀机理。结果表明:随着偶对面积比、溶液电导率的增大和溶液温度的升高,电偶电流增大。其中,温度较低时,随着时间的延长,电偶电压逐渐下降,电偶电流平缓上升;温度较高时,电偶电压呈现上升趋势,电偶电流急剧上升,且随着溶液温度的升高,腐蚀产物的粒径变小、结晶度变差,温度在75℃时腐蚀产物中有δ-FeOOH。

The galvanic corrosion mechanisms of the 304 L-BTC330 R steel galvanic pairs in simulated tap water under conditions of different galvanic pair area ratios, solution temperatures and solution conductivities were analyzed through electrochemical measurement technology and surface analysis technology. The results show that as the galvanic pair area ratio, the solution conductivity and the solution temperature increased, the galvanic current increased. Among them, when the temperature was low, the galvanic voltage gradually decreased, and galvauic current rised gently with the extension of time. When the temperature was high, galvanic voltage presented an upward trend, and galvanic current rised sharply. As the temperature of the solution rised, the particle size of corrosion products became smaller, the crystallinity became worse, and the corrosion product contained δ-FeOOH when the temperature was 75 ℃.