The synergistic inhibition effect of octylmercaptopropionate and 8-quinolinol on the corrosion of iron in an aerated 0.5 M Na2SO4 solution

T. Suzuki; H. Nishihara; K. Aramaki

doi:10.1016/0010-938X(95)00172-G

The synergistic inhibition effect of octylmercaptopropionate and 8-quinolinol on the corrosion of iron in an aerated 0.5 M Na₂SO₄ solution

T. Suzuki, H. Nishihara, K. Aramaki

Department of Mechanical Engineering

Research output: Contribution to journal › Article › peer-review

38 Citations (Scopus)

Abstract

The synergistic inhibition effect of sodium octylmercaptopropionate, C₈H₁₇S(CH₂)₂COONa (SOMP), and 8-quinolinol, C₉H₆NOH (Ql), on the corrosion of iron in an aerated 0.5M Na₂SO₄ solution was investigated by polarization measurement, X-ray photo-electron and FTIR spectroscopies and electron-probe micro-analysis. A high inhibition efficiency, 98.2%, was obtained by a mixture of 3 × 10^-4 M SOMP and 5 × 10^-4 M Ql. It was concluded that the high synergism of the mixture is mostly attributed to coverage of the iron surface with a precipitate layer composed of iron oxide and a chelate of Ql with Fe³⁺ and with a layer of Fe³⁺-SOMP complex precipitated at defects preferentially.

Original language	English
Pages (from-to)	1223-1234
Number of pages	12
Journal	Corrosion Science
Volume	38
Issue number	8
DOIs	https://doi.org/10.1016/0010-938X(95)00172-G
Publication status	Published - 1996 Aug

Keywords

A. low alloy steel
B. EPMA
B. IR spectroscopy
B. XPS
B. polarization
C. neutral inhibition

ASJC Scopus subject areas

Chemistry(all)
Chemical Engineering(all)
Materials Science(all)

Access to Document

10.1016/0010-938X(95)00172-G

Cite this

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title = "The synergistic inhibition effect of octylmercaptopropionate and 8-quinolinol on the corrosion of iron in an aerated 0.5 M Na2SO4 solution",

abstract = "The synergistic inhibition effect of sodium octylmercaptopropionate, C8H17S(CH2)2COONa (SOMP), and 8-quinolinol, C9H6NOH (Ql), on the corrosion of iron in an aerated 0.5M Na2SO4 solution was investigated by polarization measurement, X-ray photo-electron and FTIR spectroscopies and electron-probe micro-analysis. A high inhibition efficiency, 98.2%, was obtained by a mixture of 3 × 10-4 M SOMP and 5 × 10-4 M Ql. It was concluded that the high synergism of the mixture is mostly attributed to coverage of the iron surface with a precipitate layer composed of iron oxide and a chelate of Ql with Fe3+ and with a layer of Fe3+-SOMP complex precipitated at defects preferentially.",

keywords = "A. low alloy steel, B. EPMA, B. IR spectroscopy, B. XPS, B. polarization, C. neutral inhibition",

author = "T. Suzuki and H. Nishihara and K. Aramaki",

year = "1996",

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doi = "10.1016/0010-938X(95)00172-G",

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journal = "Corrosion Science",

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T1 - The synergistic inhibition effect of octylmercaptopropionate and 8-quinolinol on the corrosion of iron in an aerated 0.5 M Na2SO4 solution

AU - Suzuki, T.

AU - Nishihara, H.

AU - Aramaki, K.

PY - 1996/8

Y1 - 1996/8

N2 - The synergistic inhibition effect of sodium octylmercaptopropionate, C8H17S(CH2)2COONa (SOMP), and 8-quinolinol, C9H6NOH (Ql), on the corrosion of iron in an aerated 0.5M Na2SO4 solution was investigated by polarization measurement, X-ray photo-electron and FTIR spectroscopies and electron-probe micro-analysis. A high inhibition efficiency, 98.2%, was obtained by a mixture of 3 × 10-4 M SOMP and 5 × 10-4 M Ql. It was concluded that the high synergism of the mixture is mostly attributed to coverage of the iron surface with a precipitate layer composed of iron oxide and a chelate of Ql with Fe3+ and with a layer of Fe3+-SOMP complex precipitated at defects preferentially.

AB - The synergistic inhibition effect of sodium octylmercaptopropionate, C8H17S(CH2)2COONa (SOMP), and 8-quinolinol, C9H6NOH (Ql), on the corrosion of iron in an aerated 0.5M Na2SO4 solution was investigated by polarization measurement, X-ray photo-electron and FTIR spectroscopies and electron-probe micro-analysis. A high inhibition efficiency, 98.2%, was obtained by a mixture of 3 × 10-4 M SOMP and 5 × 10-4 M Ql. It was concluded that the high synergism of the mixture is mostly attributed to coverage of the iron surface with a precipitate layer composed of iron oxide and a chelate of Ql with Fe3+ and with a layer of Fe3+-SOMP complex precipitated at defects preferentially.

KW - A. low alloy steel

KW - B. EPMA

KW - B. IR spectroscopy

KW - B. XPS

KW - B. polarization

KW - C. neutral inhibition

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