Alkaline electrolytic polishing solution for aluminum alloy ebsd sample, preparation method and electrolytic polishing method

Abstract

The invention discloses aluminum alloy EBSD sample alkaline electrolysis polishing liquid and a preparation method and electrolysis polishing method thereof and belongs to the technical field of analysis. The aluminum alloy EBSD sample alkaline electrolysis polishing liquid and the preparation method and electrolysis polishing method thereof are suitable for aluminum alloy samples prepared by different processingmethods, operation is convenient, and the cost is low. The electrolysis polishing liquid comprises 40-100 g / L of sodium ethoxide, 15-25 g / L of sodium silicate, 10-20 g / L of sodium metaaluminate, 8-12 g / L of glucose, and water. The preparation method of the alkaline electrolysis polishing liquid comprises the steps that the water is heated to be 50 DEG C, and the sodium ethoxide, the sodium silicate, the sodium metaaluminate, the glucose and the water are added. The electrolysis polishing method comprises the steps of (1) mechanical grinding and polishing, (2) oil stain removaltreatment, and (3) electrolysis polishing. According to the aluminum alloy EBSD sample alkaline electrolysis polishing liquid and the preparation method and electrolysis polishing method thereof, theproblem that the preparation polishing effect of traditional aluminum alloy EBSD samples is poor is solved.

Description

technical field [0001] The invention relates to the technical field of electrolytic polishing, in particular to an alkaline electrolytic polishing liquid for an aluminum alloy EBSD sample, a preparation method, and an electrolytic polishing method. Background technique [0002] Since the commercialization of electron backscattering technique (EBSD) in the 1990s, as a surface analysis method, it has developed rapidly and has been widely used in the analysis of material organization and microstructure. [0003] Compared with other material characterization techniques, EBSD technology has great advantages: (1) It can obtain complete information such as structure, interface, and grain orientation; (2) It has high resolution and can obtain relevant information about texture; (3) It can establish a relationship between crystallographic information and microstructure; (4) It can be used in conjunction with scanning electron microscopy to quickly and accurately select the characteri...

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Problems solved by technology

The current processing methods for aluminum alloy EBSD samples are mainly mechanical polishing, chemical corrosion, ion thinning and electrolytic polishing. The single mechanical polishing is time-consuming and laborious, and the surface effect is poor, which has a great impact on the effect of EBSD; chemical corrosion Due to problems such as uneven corrosion, it is easy to cause uneven surface corrosion and poor surface quality; the ion thinning method has relatively high requirements for equipment, the preparation process is very complicated, and the treatment area is small, so it is not suitable for large-scale analysis of aluminum alloys. among many analysis methods, the electropolishing method has low equipment cost, easy operation, and simple preparation process. The acidic electrolytic polishing solution is more harmful to the polishing equipment, and it is easy to produce SO in the polishing process. 2 , NO 2 Such polluting gases can cause great impact and damage to the human body and the environment; in view of the important application prospects of EBSD technology in aluminum alloys, develop an environmentally friendly electrolytic polishing solution and electrolytic polishing method with good electrolytic polishing effect very important

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