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A METALLOGRAPHIC CORRADING AGENT SHOWING MARTENSITIC STAINLESS STEEL STRUCTURE

DONG Jia-kun(Surgical Instrument Factory,Shanghai Medical Instrument Group Co.Ltd.,Shanghai 200072,China)  
HF+HNO_3 water solution can be used for corroding of metallographic sample of martensitic stainless steel,corroding efficacious is the same as its of 4% nitric acid alcohol solution,corroding speed is quick and corroding test surface is clear,similar discoloration made on test surface can be avoided when FeCl+HCl water solution is applied.
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