Influence of Water Quality Factors on Stability Index of Water and Corrosion Rate of Steel (Part 2) Investigation on the Addition of Polyacrylic Acid as a Corrosion Inhibitor

Makoto Yuasa; Yuusuke Sakai; Takashi Fujieda; Isao Sekine; Nobuyuki Momozawa; Toshiharu Wake; Hiromichi Murata; Yoshiaki Shibata; Shintarou Someya

doi:10.3323/jcorr1991.50.558

Influence of Water Quality Factors on Stability Index of Water and Corrosion Rate of Steel (Part 2)

Investigation on the Addition of Polyacrylic Acid as a Corrosion Inhibitor

Makoto Yuasa, Yuusuke Sakai, Takashi Fujieda, Isao Sekine, Nobuyuki Momozawa, Toshiharu Wake, Hiromichi Murata, Yoshiaki Shibata, Shintarou Someya

Author information

Makoto Yuasa
Faculty of Science and Technology, Tokyo University of Science
Institute of Colloid and Interface Science, Tokyo University of Science
Yuusuke Sakai
Faculty of Science and Technology, Tokyo University of Science
Takashi Fujieda
Faculty of Science and Technology, Tokyo University of Science
Isao Sekine
Faculty of Science and Technology, Tokyo University of Science
Nobuyuki Momozawa
Faculty of Science and Technology, Tokyo University of Science
Institute of Colloid and Interface Science, Tokyo University of Science
Toshiharu Wake
Japan Organo Corp.
Hiromichi Murata
Japan Organo Corp.
Yoshiaki Shibata
Japan Organo Corp.
Shintarou Someya
Japan Organo Corp.

Keywords: stability index, corrosion rate, water quality factor, corrosion inhibitor, corrosion weight loss test, numerical value analysis

JOURNAL FREE ACCESS

2001 Volume 50 Issue 12 Pages 558-563

DOI https://doi.org/10.3323/jcorr1991.50.558

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Abstract

The influence of water quality factors such as silica (SiO₂) and chloride ion (Cl^-) on a stability index of water and corrosion rate of steel was investigated in a solution with polyacrylic acid (PAA) as a corrosion inhibitor. In corrosion weight loss tests, the corrosion rate in PAA additive system decreased in comparison with that in PAA non-additive system as reported in previous paper and was dependent on [SiO₂] and [Cl^-]. In solutions with SiO₂ and Cl^- of PAA additive system, the corrosive property become weak as the stability index was smaller. In numerical value analysis, SiO₂ had an ability of corrosion inhibition in PAA additive system as well as non-additive one, and then, tended to change the stability index at chemical equilibrium state. The influence of Cl^- in solutions with SiO₂ of PAA additive system differed from that of non-additive system : The corrosion rate was affected by Cl^- and the stability index was not.

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