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Abstract In tests conducted with air containing known concentrations of acetic acid vapour and moisture, it was found that very small amounts of acetic acid (0.5 p.p.m. or less) can promote corrosion of metals at moisture levels of 80% R.H. and above. The type of corrosion product varies with the concentration of acetic acid and moisture. A number of common metals are affected, but aluminium is relatively resistant, and tin is outstandingly so. With metals exposed to vapours from damp wood, corrosion is markedly promoted when the wood has previously been heated in kiln‐drying after rot‐proofing treatment with aqueous solutions.
Clarke et al. (Wed,) studied this question.