Electrochemical Corrosion Behavior of Different Graphite Shapes Cast Irons in Acidic Solution

Abstract:

The effect of graphite shapes on the electrochemical corrosion behavior of cast iron was studied by means of weight loss tests, electrochemical measurements and electron microscopy. It was found that the electrochemical corrosion behavior of graphite is significantly different from one other, and the corrosive potential difference between carbide ad the matrix is the main driving force of the different phase corrosions. Among them, the center A type and edge D type graphite exhibited the highest corrosion resistance. The corrosion of white iron is worst, because there are so many type carbides in white iron and so there is an obvious tendency to produce micro-cell in white iron.

• Periodical: Advanced Materials Research (Volume 906)
• Pages: 275-282
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.906.275
• Online since: April 2014
• Authors: Zhu Huan Yu*, Jun Feng Qiang, Hui Lu Li
• Keywords: Cast Iron, Corrosion Resistance, Electrochemical Behavior, Polarization Curve

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