Studies on the corrosion inhibiting effect of Congo red dye-halide mixtures

Purpose - To investigate the efficacy of Congo red dye (CR) as an inhibitor of the acid corrosion of mild steel and aluminium alloy (AA 1060) and to assess the influence of halide ions on the inhibition efficiency.Design methodology approach - Corrosion rates were estimated by monitoring the weight...

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Bibliographic Details
Published in:Pigment & resin technology 2006-01, Vol.35 (1), p.30-35
Main Authors: Oguzie, E.E, Ebenso, E.E
Format: Article
Language:English
Subjects:
Additives
Adsorption
Alloys
Aluminum alloys
Applied sciences
Corrosion
Corrosion inhibitors
Dyes
Efficiency
Exact sciences and technology
Experiments
Fibers and threads
Forms of application and semi-finished materials
Hydrochloric acid
Investigations
Metals
Polymer industry, paints, wood
Steel alloys
Sulfur
Technology of polymers
Temperature
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Summary:Purpose - To investigate the efficacy of Congo red dye (CR) as an inhibitor of the acid corrosion of mild steel and aluminium alloy (AA 1060) and to assess the influence of halide ions on the inhibition efficiency.Design methodology approach - Corrosion rates were estimated by monitoring the weight losses of the metal specimen as a function of time at different temperatures. Inhibition efficiency was determined by comparing the corrosion rates in the acid medium in the absence and presence of the additive.Findings - CR dye reduced the corrosion rates of mild steel and aluminium in the acidic environment. Better inhibition was observed with the mild steel specimen. Protection efficiency was sensitive to inhibitor concentration as well as temperature and generally increased with an increase in CR dye concentration. The halide additives improved the inhibition efficiency in the order KCl 
ISSN:0369-9420
1758-6941
DOI:10.1108/03699420610638021