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Organic corrosion inhibitors for mild steel in aerated near neutral chloride solutions

Shiyao Tan,Glenn Hefter,Neil A. North-1990-01-01-Murdoch Research Repository (Murdoch University)

TL;DRAbstract

Over 120 organic compounds have been investigated as potential corrosion inhibitors for mild steel in simulated engine coolants. A relationship has been found between the corrosion potential (Ecorr) and inhibitor performance (Rp). With straight chain alkyl carboxylates, maximum inhibition was found for C6- C10 monocarboxylates and C7- C12 dicarboxylates. Polarization curves for selected inhibitors and the Ecorr- Rp relationship suggest these compounds affect only the anodic dissolution. The inhibitor effectiveness of sebacate was found to be unaffected by stirring or the presence of corrosion products.

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Over 120 organic compounds have been investigated as potential corrosion inhibitors for mild steel in simulated engine coolants. A relationship has been found between the corrosion potential (Ecorr) and inhibitor performance (Rp). With straight chain alkyl carboxylates, maximum inhibition was found for C6- C10 monocarboxylates and C7- C12 dicarboxylates. Polarization curves for selected inhibitors and the Ecorr- Rp relationship suggest these compounds affect only the anodic dissolution. The inhibitor effectiveness of sebacate was found to be unaffected by stirring or the presence of corrosion products.

Keywords

CorrosionDissolutionPolarization (electrochemistry)Corrosion inhibitorCoolantChlorideAerationChemistry

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