Abstract
AbstractThis paper discusses the electrochemical behavior and corrosivity of aqueous sulfidic solutions with reference to iron and carbon steel. The chemistry of aqueous sulfidic solutions is reviewed with particular emphasis on stability of various sulfur species in aqueous solutions as a function of pH and solution potential. The thermodynamic predictions of corrosion processes for iron in sulfidic solution are discussed in terms of the potential pH equilibrium diagrams. Considerable discussion of the corrosion and electrochemical behavior of iron in sulfidic solutions includes the role of solution composition on corrosion and polarization behavior. The influence of surface films on corrosion in these systems is also discussed. The paper concludes with a discussion of the role solution composition on hydrogen absorption and embrittlement of iron and carbon steel.
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