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The corrosion characteristics of L245 steel were analyzed under H2S atmosphere in stratum water with imidazoline quaternary ammonium salt (IM), and IM mixed with octylphenol polyoxyethene ether (OP). L245 suffered pitting corrosion in solutions with only IM, but pitting corrosion was inhibited in solutions with IM and OP. Local damages of the adsorbed IM film appeared on the steel surface in solutions...
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