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The Research of Intercrystalline Corrosion Quantitative Expression Method

Author: BianNa
Tutor: ZhangShengHan
School: North China Electric Power University (Hebei)
Course: Environmental Engineering
Keywords: Intergranular corrosion 304 stainless steel EPR method
CLC: TG172
Type: Master's thesis
Year: 2008
Downloads: 140
Quote: 0
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Abstract


This paper studies the the the corrosion groove width quantitative sulfuric acid etching method indicates the feasibility of stainless steel to intergranular corrosion susceptibility . Measured the width of the groove of the corrosion caused by sensitizing heat treatment at different times of stainless steel in a sulfuric acid solution , while the electrochemical activation (EPR) method and oxalic acid etching method were measured on these stainless steel sensitized . The results show that the sensitized heat treatment time is longer , the greater the degree of EPR measured sensitized , the sulfuric acid produced by the etching method the greater the width of the etched groove . EPR measured sensitized degrees and sulfuric acid etching method the measured width of the etched groove , there is a good linear relationship between the stainless steel sensitized can be quantitatively expressed by etching a groove width . Oxalic acid electrolytic etching method can not distinguish the different sensitized stainless steel of heat-treating time , the degree of sensitized .

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CLC: > Industrial Technology > Metallurgy and Metal Craft > Metallurgy and Heat Treatment > Metal corrosion protection,metal surface treatment > Various types of metal corrosion
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