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Title: Assessing performance of painted carbon and weathering steels in an industrial atmosphere

Abstract

Protective properties and electrochemical impedance characteristics of four painted steels were investigated after outdoor exposure for 6 years and laboratory-based immersion tests. Results were compared to evaluate performance of the two paint systems for different steel substrates. The silicate-type primer/epoxy-based micaceous iron oxide (MIO) paint/polyurethane topcoat system showed better performance than the epoxy-type primer/epoxy-based MIO paint/polyvinyl chloride (PVC) topcoat system. The former paint system showed better topcoat protection and more effective cathodic protection (CP) provided by the zinc-rich primer. Two forms of paint degradation, blistering and pore attack, were observed. Paint degradation was correlated with changes in paint resistance and the breakpoint frequency of impedance data. Based upon visual observation and changes in impedance characteristics, two impedance models were proposed to explain the paint degradation.

Authors:
;  [1];  [2]
  1. National Tsing Hua Univ., Hsinchu (Taiwan, Province of China)
  2. China Steel Corp., Kaoshiung (Taiwan, Province of China)
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
458220
Resource Type:
Journal Article
Journal Name:
Corrosion
Additional Journal Information:
Journal Volume: 53; Journal Issue: 3; Other Information: PBD: Mar 1997
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; CORROSION PROTECTION; STEELS; PERFORMANCE; PAINTS; EPOXIDES; POLYURETHANES; PVC; WEATHER; BENCH-SCALE EXPERIMENTS; CATHODIC PROTECTION; BLISTERS; POROSITY

Citation Formats

Wang, J H, Shih, H C, and Wei, F I. Assessing performance of painted carbon and weathering steels in an industrial atmosphere. United States: N. p., 1997. Web. doi:10.5006/1.3280462.
Wang, J H, Shih, H C, & Wei, F I. Assessing performance of painted carbon and weathering steels in an industrial atmosphere. United States. https://doi.org/10.5006/1.3280462
Wang, J H, Shih, H C, and Wei, F I. 1997. "Assessing performance of painted carbon and weathering steels in an industrial atmosphere". United States. https://doi.org/10.5006/1.3280462.
@article{osti_458220,
title = {Assessing performance of painted carbon and weathering steels in an industrial atmosphere},
author = {Wang, J H and Shih, H C and Wei, F I},
abstractNote = {Protective properties and electrochemical impedance characteristics of four painted steels were investigated after outdoor exposure for 6 years and laboratory-based immersion tests. Results were compared to evaluate performance of the two paint systems for different steel substrates. The silicate-type primer/epoxy-based micaceous iron oxide (MIO) paint/polyurethane topcoat system showed better performance than the epoxy-type primer/epoxy-based MIO paint/polyvinyl chloride (PVC) topcoat system. The former paint system showed better topcoat protection and more effective cathodic protection (CP) provided by the zinc-rich primer. Two forms of paint degradation, blistering and pore attack, were observed. Paint degradation was correlated with changes in paint resistance and the breakpoint frequency of impedance data. Based upon visual observation and changes in impedance characteristics, two impedance models were proposed to explain the paint degradation.},
doi = {10.5006/1.3280462},
url = {https://www.osti.gov/biblio/458220}, journal = {Corrosion},
number = 3,
volume = 53,
place = {United States},
year = {Sat Mar 01 00:00:00 EST 1997},
month = {Sat Mar 01 00:00:00 EST 1997}
}