Investigating the Effect of Chemical Treatments on Corrosion Behavior of Carbon Steel via Electrochemical Noise and Polarization Methods
Publish place: 2nd International Conference on Automotive Paint and Coating
Publish Year: 1388
Type: Conference paper
Language: English
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ICAPC02_017
Index date: 13 July 2009
Investigating the Effect of Chemical Treatments on Corrosion Behavior of Carbon Steel via Electrochemical Noise and Polarization Methods abstract
The effect of phosphating the surface of carbon steel and phosphating with posttreatment of passivation via chrome-free solution based on zirconium on corrosion rate and resistance of carbon-steel in 3.5% NaCl solution has been investigated via Electrochemical Noise Method (ENM) and Polarization tests (DC tests) as well. The noise resistance curves illustrate phosphating improves the resistance of carbonsteel against corrosion, and this effect enhances by post-treatment of passivation on account of the fact that a passive thin layer of zirconium dioxide forms on the surface, which can seal the porosities of phosphate coating. The result of polarization tests show that LPR of carbon-steel increases by phosphating, and thanks to the formed passive film, the LPR of carbon-steel enhances more significantly after passivation. Moreover, the role of passivating post-treatment on corrosion rate reduction is approved by results of polarization tests. Also the the result of noise resistance curves is confirmed by LPR curves.
Investigating the Effect of Chemical Treatments on Corrosion Behavior of Carbon Steel via Electrochemical Noise and Polarization Methods Keywords:
Investigating the Effect of Chemical Treatments on Corrosion Behavior of Carbon Steel via Electrochemical Noise and Polarization Methods authors
S Tahmasebi
Polymer Engineering Department, Amir Kabir University, Tehran, Iran
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