Corrosion protection mechanisms of carbon nanotube and zinc-rich epoxy primers on carbon steel in simulated concrete pore solutions in the presence of chloride ions
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- 作者：Y. Cubides ypc2@tamu.edu" class="auth_mail" title="E-mail the corresponding author ; H. Castaneda ; hcastaneda@tamu.edu" class="auth_mail" title="E-mail the corresponding author
- 关键词：A. Zinc ; A. Carbon steel ; A. Concrete ; B. EIS ; B. SEM ; C. Paint coatings
- 刊名：Corrosion Science
- 出版年：2016
- 出版时间：August 2016
- 年：2016
- 卷：109
- 期：Complete
- 页码：145-161
- 全文大小：4828 K
文摘
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The presence of carbon nanotubes in zinc-rich epoxy primer with 60 wt% zinc content influence the predominant barrier protection mechanism.
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The carbon nanotube and zinc-rich epoxy primer with 70 wt% zinc content were able to provide a good balance between mass transfer (barrier) and charge transfer (cathodic protection) mechanisms.
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For carbon nanotube and zinc-rich epoxy primers with 80 wt% and 90 wt% zinc content the dominant mechanism is cathodic protection.
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A porous protective layer of zinc corrosion products was formed at the coating surface with the highest Zn concentrations (80 wt% and 90 wt%).