INHIBITING ACTION OF LONG ALKYL POLYAMINE(LCMA) ON IRO NCORROSION IN H2S-CONTAINING SULFURIC ACID SOLUTIONS

J Chin Soc Corr Pro

2001, Vol. 21

Issue (1): 19-25 DOI:

Research Report

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INHIBITING ACTION OF LONG ALKYL POLYAMINE(LCMA) ON IRO NCORROSION IN H2S-CONTAINING SULFURIC ACID SOLUTIONS

Lijing Yan;Fan Yang;Haichao Lin

中科院金属腐蚀与防护研究所电化学室

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Abstract Design and synthesis a series of LCMA compounds.The inhibiting action of LCMA in H2S-containing sulfuric acid solutions has been studied by electrochemical methods.The results showed that LCMA could adsorb in parallel direction and retard anodic and cathodic reactions of iron in H2S med ia through negative-catalysis effect.The high inhibiting efficiency of LCMA was closely correlative with the structure of function groups and the length of carb on chain.LCMA with less hydroxyethyl group and longer carbon chain could exhibit more excellent inhibiting effect.The strong inhibiting action of LCMA in low co ncentration was attributed to the high coverage degree of LCMA molecule,which wa s resulted from multi-adsorption.

Key words: iron H2S LCMA inhibiting action

Received: 30 November 1999

ZTFLH:

TG174.42

Corresponding Authors: Lijing Yan

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Lijing Yan; Fan Yang; Haichao Lin. INHIBITING ACTION OF LONG ALKYL POLYAMINE(LCMA) ON IRO NCORROSION IN H2S-CONTAINING SULFURIC ACID SOLUTIONS. J Chin Soc Corr Pro, 2001, 21(1): 19-25 .

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https://www.jcscp.org/EN/ OR https://www.jcscp.org/EN/Y2001/V21/I1/19

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