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Electrochemical studies of polyaspartic acid and sodium tungstate as corrosion inhibitors for brass and Cu30Ni alloy in simulated cooled water solutions

Article Information:

Title:

Electrochemical studies of polyaspartic acid and sodium tungstate as corrosion inhibitors for brass and Cu30Ni alloy in simulated cooled water solutions

Author(s):

Qun-Jie Xu, Guo-Ding Zhou, Hui-Feng Wang, Wen-Bin Cai

Journal:

Anti-Corrosion Methods and Materials

Year:

2006

Volume:

53

Issue:

4

Page:

207 - 211


ISSN:

0003-5599


DOI:

10.1108/00035590610678893

Publisher:

Emerald Group Publishing Limited

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Abstract:

Purpose – The aim of this paper is to study the inhibition effect of environmentally friendly inhibitors; polyaspartic acid (PASP), Na2WO4 and the complex of PASP and Na2WO4 for brass and Cu30Ni alloy (B30) corrosion in simulated cooled water solutions.

Design/methodology/approach – The inhibiting effect was investigated in simulated cooled water solutions by potentiodynamic polarization (DC) and electrochemical impedance spectroscopy.

Findings – The results indicated that PASP and Na2WO4 both had an inhibition effect. A desirable inhibition effect was shown for brass and B30 corrosion at a PASP concentration of 15?mg/L. The best inhibition effects for Na2WO4 appeared at 10?mg/L for B30 corrosion and at 20?mg/L for brass, respectively. The combination of PASP and Na2WO4 showed a synergistic effect. The optimum ratio of PASP to Na2WO4 was 6:1 at the total inhibitor concentration of 20?mg/L.

Originality/value – This paper has for the first time showed that the two environmentally friendly inhibitors PASP and Na2WO4 had an inhibition effect for brass and B30 corrosion and the complex of PASP and Na2WO4 had good synergistic effect for brass and B30 corrosion in simulated cooled water solutions.

Keywords:

Alloys, Copper, Corrosion inhibitors


Article Type:

Research paper


Article URL:

http://www.emeraldinsight.com/10.1108/00035590610678893

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