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Impact of Surface Finishing on Corrosion Inhibition Performance

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The effect of carbon steel coupon surface finishing processes on corrosion in a carbon dioxide environment with high and low salinity. The system was also tested with and without chemical inhibitors.

Product Number: 51317--9175-SG
ISBN: 9175 2017 CP
Author: Zhengwei Liu
Publication Date: 2017
Industries: Science of Corrosion , Coatings and Linings
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The effect of corrosion coupon surface finishing processes on inhibitors’ performance was studied in CO2 environment. Two surface-finishing techniques aluminum oxide beads blasting and sandpaper polishing were used in this study. The resulting surfaces were characterized by white light interferometry and other techniques. The corrosion rate with and without the presence of corrosion inhibitors were evaluated using linear polarization methods. Several commercially available inhibitor products including imidazoline quaternary amines phosphate ester and mercaptans were evaluated. It was found that the protection efficiency of mercaptans vary significantly with the coupons’ surface roughness.

Keywords: surface roughness, corrosion inhibitors, interferometry.

The effect of corrosion coupon surface finishing processes on inhibitors’ performance was studied in CO2 environment. Two surface-finishing techniques aluminum oxide beads blasting and sandpaper polishing were used in this study. The resulting surfaces were characterized by white light interferometry and other techniques. The corrosion rate with and without the presence of corrosion inhibitors were evaluated using linear polarization methods. Several commercially available inhibitor products including imidazoline quaternary amines phosphate ester and mercaptans were evaluated. It was found that the protection efficiency of mercaptans vary significantly with the coupons’ surface roughness.

Keywords: surface roughness, corrosion inhibitors, interferometry.

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