Austenite stainless steel erosion agent and preparation method and application thereof

Abstract

The invention provides an austenite stainless steel erosion agent and a preparation method and application thereof. Ethyl alcohol serves as a solvent of the erosion agent. The solvent comprises, by per liter, 60-120 ml / L of concentrated nitric acid, 150-300 ml / L of concentrated hydrochloric acid and 100-200 g / L of ferric chloride. According to the austenite stainless steel erosion agent provided by the invention, the erosion agent is a novel erosion agent obtained through repeated exploration in the experimental process, the adverse effects of the high volatility and corrosivity of aqua regia on a human body are avoided, the situation that dotted spots are produced due to uneven corrosion through a hydrochloric acid FeCl3 water solution and the other erosion agents, and the erosion process is easy to control; in addition, a polishing effect is achieved to a certain extent, tiny scratches on the surface of an austenite alloy sample can be removed, and austenite grain boundaries and the precipitated phase morphology can be clearly and completely shown; moreover, compared with other common erosion agents, the austenite stainless steel erosion agent is stable in component, capable of being stored for a long time under an airtight condition and high in using convenience.

Description

technical field [0001] The invention relates to a metal treatment agent, in particular to an austenitic stainless steel etchant and its preparation method and application. Background technique [0002] Austenitic stainless steel generally has a higher content of austenitic alloying elements, such as Mn, Ni, Ti, Co and other alloying elements, so its corrosion resistance is much higher than that of ordinary ferritic or martensitic alloys. , usually using aqua regia, hydrochloric acid FeCl 3 Several methods such as aqueous solution, picric hydrochloric acid aqueous solution and hydrofluoric acid. [0003] In actual use, aqua regia has a good corrosion effect. Whether the corrosive liquid splashes on the human body or the volatilized acid gas is inhaled into the body, it will cause great damage to human health, which greatly limits the application range of aqua regia. [0004] The aqueous solution of picric hydrochloric acid also has a good erosion effect, but the scientific ...

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Problems solved by technology

[0004] The aqueous solution of picric hydrochloric acid also has a good erosion effect, but the scientific name of picric acid is 2,4,6-trinitrophenol, which is an explosive chemical. It can explode when heated, exposed to open flames, high heat, or subjected to friction, vibration, and impact. , picric acid contact with the skin, or volatilize into the respiratory tract, all have adverse effects on human health, and the protection requirements for storage and use are relatively high

[0005] Hydrochloride FeCl 3 Aqueous solution can also corrode austenitic stainless steel and show grain boundaries. However, due to the addition of strong oxidizing substances, it is easy to cause pitting corrosion during the corrosion process. erosion effect

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