Rapid detection method for copper content in stainless steel

Abstract

The invention relates to a rapid detection method for copper content in stainless steel, which comprises the steps of electrolyte preparation, developer preparation, electrolytic reaction and color developing comparison. The method provided by the invention has the advantages of simple operation, acute phenomenon, easy observation, accurate and reliable result and low identification cost, and is suitable for semi-quantitative detection of copper-containing steel under various environment conditions. According to the simple operation, the stainless steel with more than 1.0% of copper content can be rapidly detected, and method is different from the method for detecting common austenitic stainless steel and austenite antibiosis stainless steel, and can be used for on-site screening and detecting the copper-containing stainless steel.

Description

technical field

[0001] The invention specifically relates to a method for quickly identifying copper-containing stainless steel with a copper content of more than 1%, and belongs to the field of chemical analysis methods. Background technique

[0002] Copper is a non-carbide forming element, which mainly forms a solid solution with iron in steel; usually, copper is a harmful element in steel, and when the content exceeds 0.3%, high-temperature copper embrittlement will occur during hot pressure processing, so most stainless steel To avoid the presence of large amounts of copper. However, in order to improve the acid corrosion resistance of austenitic stainless steel, 2% to 3% copper is often added as an alloying element in some stainless steels.

[0003] In recent years, a new type of stainless steel—antibacterial stainless steel has been developed. It uses about 3.5% copper element in austenitic stainless steel to form a dispersed ε-Cu phase in the steel and has antibacter...