Grain Size Effect on the Electrochemical Corrosion Behavior of Surface Nanocrystallized Low-Carbon Steel

CORROSION ◽  
2004 ◽  
Vol 60 (10) ◽  
pp. 891-896 ◽  
Author(s):  
Y. Li ◽  
F. Wang ◽  
G. Liu
Keyword(s):  
Grain Size ◽  
Carbon Steel ◽  
Size Effect ◽  
Corrosion Behavior ◽  
Low Carbon Steel ◽  
Electrochemical Corrosion ◽  
Grain Size Effect ◽  
Low Carbon ◽  
Electrochemical Corrosion Behavior

Effect of RE on Microstructure and Electrochemical Corrosion Behavior of Arc Sprayed Zn-Al-Mg Coating

2011 ◽  
Vol 66-68 ◽  
pp. 727-730 ◽  
Author(s):  
Zi Xin Zhu ◽  
Dong Chen ◽  
Bin Shi Xu
Keyword(s):  
Corrosion Behavior ◽  
Low Carbon Steel ◽  
Electrochemical Corrosion ◽  
Arc Spraying ◽  
Uniform Corrosion ◽  
Low Carbon ◽  
Discernible Effect ◽  
Electrochemical Corrosion Behavior ◽  
Superior Corrosion Resistance ◽  
Steel Substrates

Cored wires and arc spraying technique were used to produce Zn-Al-Mg-RE alloy coatings on low carbon steel substrates. The effect of RE (where RE is Rare Earth) on the microstructure and electrochemical corrosion behavior of coatings was investigated comparing with Zn-Al-Mg coatings. With addition of RE, the Zn-Al-Mg-RE coating has denser microstructure and fewer porosity. But RE has no discernible effect on the adhesion strength between coating and substrate. The Zn-Al-Mg-RE coating has superior corrosion resistance compared to Zn-Al-Mg coating due to the formation of more compact and uniform corrosion products. The role of the RE elements appears to be associated with the self-sealing process and the refinement of the coating microstructure.

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