Metallographic corrosive and metallographic structure display method of copper and copper alloy

Abstract

The invention provides a metallographic structure display method of copper and a copper alloy. The metallographic structure display method of the copper and the copper alloy comprises the steps of: (1), providing a metallographic sample of the copper and the copper alloy, wherein the metallographic sample comprises a copper layer and a copper alloy layer plated on the copper layer; (2), providinga container, fixing the metallographic sample into the container, and adding polyflor resin; (3), taking out the metallographic sample encircled by the polyflor resin, mechanically grinding the metallographic sample, and then, mechanically polishing the grinded metallographic sample; (4), providing a metallographic corrosive, wherein the metallographic corrosive is mixed solution of ferric trichloride and hydrochloric acid, and performing metallographic micro-corrosion by dip dyeing of the polished metallographic sample through the metallographic corrosive; and (5), washing and drying the corroded metallographic sample, observing the copper layer and the copper alloy layer of the dried metallographic sample by using a microscope, so that the boundary of the copper and the copper alloy canbe displayed clearly, and measurement of the thickness of the copper layer can be easily carried out.

Description

【Technical field】 [0001] The invention relates to a metallographic structure observation test technology, in particular to a metallographic corrosion agent, copper and copper alloy metallographic structure display method applied to the observation of the metallographic microstructure of the surface coating. 【Background technique】 [0002] The internal structure of metal materials is directly and closely related to material properties such as hardness, strength, and ductility. Metallographic observation is the most direct and effective method for studying the internal structure of metal materials. Metallographic refers to the chemical composition of metal or alloy and the physical state and chemical state of various components inside the metal or alloy. The metallographic microstructure observation method can be used to observe the boundaries and thicknesses of different metal or alloy layers. Among them, the observation of the metallographic microstructure of the surface co...

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Problems solved by technology

[0003] However, in the prior art, the effect of layered metallographic microstructure display on copper and copper alloys is relatively poor, and the methods and steps for performing metallographic microstructure display on copper and copper alloy layers are cumbersome

For example, electrolytic corrosion of copper and copper alloys will be affected by factors such as voltage, current, temperature and time, and the degree of corrosion is difficult to control

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