Polyhydroxy derivatives of anthraquinone adsorbed on AISI 4340 steel foil increase the resistance of the foil to stress corrosion cracking in aerated 0.6M aqueous sodium chloride acidified with hydrogen chloride to pH 1.5. It is suggested that these compounds act as acceptors of atomic hydrogen or of other intermediates involved in the electrolytic discharge of hydrogen and that the reduced form of the compound is re-oxidized to its original state by dissolved oxygen in the sodium chloride solution.
© 1969 National Association of Corrosion Engineers
1969
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