Study on Corrosion inhibition by N-Sulfonic Amino-Dimethylenephosphonic Acid

J Chin Soc Corr Pro

2000, Vol. 20

Issue (2): 105-110 DOI:

Research Report

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Study on Corrosion inhibition by N-Sulfonic Amino-Dimethylenephosphonic Acid

Wenzhong Yang;

南京化工大学

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Abstract The corrosion inhibition by SADP(N-sulfonic amino-dimethylene phosphonic acid) on 0Cr13 stainless steel was studied by linear polarization and anodic polarization curve methods in 0.10mol/L H2SO4 solutions, compared with HEDP(1-hydroxyethylidene-1, 1-diphosphonic acid) and ATMP(aminotrimethylenephosphonic acid).It was found that these three phosphonic acids have remarkable inhibition effect on the corrosion of 0Cr13 stainless steel in H2SO4 solutions. The corrosion inhibiton mechanism by SADP、HEDP、ATMP on 0Cr13 was found to be the geometric blocking effect. Results showed that the adsorption of all these three phosphonic acids follows the Langmuir adsorption isotherm. The order in the corrosion inhibition effciency may be arranged as follows:ηSADP>ηATMP>ηHEDP.

Key words: phosphonic acid inhibiting action N-sulfonic amino-dimethylene phosphonic acid

Received: 02 April 1999

ZTFLH:

TQ174.42

Corresponding Authors: Wenzhong Yang

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Cite this article:

Wenzhong Yang. Study on Corrosion inhibition by N-Sulfonic Amino-Dimethylenephosphonic Acid. J Chin Soc Corr Pro, 2000, 20(2): 105-110 .

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https://www.jcscp.org/EN/ OR https://www.jcscp.org/EN/Y2000/V20/I2/105

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