Electrochemical Corrosion Behavior of Low Carbon Steel in Concentrated Geologic Vadose Waters

CORROSION ◽  
1999 ◽  
Vol 55 (11) ◽  
pp. 1012-1019 ◽  
Author(s):  
T. Lian ◽  
D. A. Jones
Keyword(s):  
Carbon Steel ◽  
Corrosion Behavior ◽  
Low Carbon Steel ◽  
Electrochemical Corrosion ◽  
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.

Effect of Nanoparticle Addition in Hybrid Sol-Gel Silane Coating on Corrosion Resistance of Low Carbon Steel

2013 ◽  
Vol 686 ◽  
pp. 244-249 ◽  
Author(s):  
Poovarasi Balan ◽  
Aaron Ng ◽  
Chee Beng Siang ◽  
R.K. Singh Raman ◽  
Eng Seng Chan
Keyword(s):  
Corrosion Resistance ◽  
Carbon Steel ◽  
Electrochemical Impedance ◽  
Sol Gel ◽  
Low Carbon Steel ◽  
Electrochemical Corrosion ◽  
Alumina Nanoparticles ◽  
Low Carbon ◽  
Silane Coating ◽  
Sol Gel Films

Chromium pre-treatments of metal have been replaced by silane pre-treatments as more environmental friendly option. Nanoparticles can be added in the silane sol-gel network have been reported to improve corrosion resistance. In this work, the electrochemical corrosion resistance of low carbon steel coated with hybrid organic-inorganic sol-gel film filled with nanoparticles was evaluated. The sol-gel films have been synthesized from 3-glycidoxy-propyl-trimethoxy-silane (3-GPTMS) and tetra-ethyl-ortho-silicate (TEOS) precursors. These films have been impregnated with 300 ppm of silica or alumina nanoparticles. The electrochemical behavior of the coated steel was evaluated by means of electrochemical impedance spectroscopy (EIS) and scanning electron microscopy (SEM). Equivalent circuit modeling, used for quantifying the EIS measurements showed that sol-gel films containing silica nanoparticles improved the barrier properties of the silane coating. The silica nanoparticle-containing films showed highest initial pore resistance over the five days of immersion in 0.05M NaCl.

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