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

The galvanic corrosion mechanisms of the 304L-BTC330R 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 ℃.