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Which outcome accelerates the corrosion rate of stainless steel in seawater environments?

A)Formation of a passivating chromium oxide layer
B)Galvanic coupling with a less noble metal
C)Depletion of dissolved oxygen near the surface
D)Increased water salinity and lower pH

💡 Explanation

When stainless steel is galvanically coupled to a less noble metal in seawater, an electrochemical cell forms because the less noble metal corrodes preferentially, accelerating the corrosion rate of the stainless steel. Therefore corrosion accelerates, rather than passivating or slowing when oxygen or water salinity is changed.

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