Electrochemical studies of polyaspartic acid and sodium tungstate as corrosion inhibitors for brass and Cu30Ni alloy in simulated cooled water solutions
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
Citation
Xu, Q., Zhou, G., Wang, H. and Cai, W. (2006), "Electrochemical studies of polyaspartic acid and sodium tungstate as corrosion inhibitors for brass and Cu30Ni alloy in simulated cooled water solutions", Anti-Corrosion Methods and Materials, Vol. 53 No. 4, pp. 207-211. https://doi.org/10.1108/00035590610678893
Publisher
:Emerald Group Publishing Limited
Copyright © 2006, Emerald Group Publishing Limited