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Material
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Table E - Materials that will resist corrosionThe edges of some of the hardest materials can be quickly eroded by acid in the materials being cut. Tungsten carbide, so hard that it is usually ground with diamond wheels, will not last long at all around acids, as they eat out the cobalt binder, causing the cutting edge to flake off. Even in cutting rubber, the sulfur combines with the water coolant to form a mild sulfuric acid which will pit and corrode a knife's cutting edge.Any of the steels with a chrome content over 4% will effectively resist corrosion in varying degrees, with 440-C Stainless being the best. |
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