Cleaning solution for removing water spots on surface of metallographic specimen and using method thereof

Abstract

The invention discloses a cleaning solution for removing water spots on the surface of a metallographic specimen and a use method thereof, and particularly relates to the field of metallographic specimen preparation and metal surface treatment, and the formula comprises the following raw materials by weight: 100g of deionized water, 3-30g of anhydrous sodium carbonate and 3-30g of EDTA (ethylenediamine tetraacetic acid) at room temperature, wherein the weight ratio of anhydrous sodium carbonate to EDTA is about 1:1-2:1. The method can effectively solve the problem of water stain residue causedby water seepage or incomplete cleaning on the surfaces of metallographic specimens and other specimens with high requirements on the cleanliness of the alloy surface, can make a metallographic observation surface bright and clean, and effectively identifies the grain boundary, precipitated phase and crack tip morphology.

Description

technical field [0001] The invention belongs to the field of metallographic sample preparation and metal surface treatment, and specifically relates to a cleaning solution for removing water stains on the surface of metallographic samples and a method for using the same, and is especially suitable for metallographic samples that require relatively high cleanliness on the surface of alloys. High sample water spot cleaning. Background technique [0002] Metallographic testing methods are widely used in material quality testing, and are also one of the must-test items for component failure analysis. Although the method of metallographic detection is simple and widely used, in order to obtain ideal metallographic structure photos, the requirements for the surface state of the metal sample are extremely high, and it is necessary to make the sample as bright as a mirror through continuous grinding and polishing; Clean and dry the remaining polishing paste on the surface with abso...

AI Technical Summary

Problems solved by technology

[0003] For inlaid metallographic samples, as well as samples with cracks or coatings, since moisture, polishing paste, and debris generated during the sample preparation process are likely to remain in the gaps or holes, cleaning with absolute ethanol and drying with hot air cannot Remove stains in gaps or holes. Affected by capillarity, residual moisture and impurities will gradually seep out of the gaps during the photographing process, and stains will form near the gaps of the sample, affecting the photographic effect; for materials with weak corrosion resistance , the seepage of water stains may cause the surface of the sample to rust, causing misjudgment of the metallographic structure of the material

At present, the sample cleaning methods are mostly repeated cleaning and drying, and try to complete the shooting before the water stain seeps out. Usually, a sample needs to be repeated many times to complete the observation and analysis. The work intensity is high and the work efficiency is low.

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