Metallographic corrosive agent for nickel-based alloy, and using method
A nickel-based alloy and etchant technology, applied in the field of metallographic etchants, can solve problems such as failure of metallographic testing, uneven surface corrosion of samples, environmental pollution, etc. , good corrosion effect
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Embodiment 1
[0019] Example 1: Metallographic etchant for K213 nickel-based alloy (nickel content about 34% to 38%) and the method of use are as follows:
[0020] Corrosive agent preparation: Weigh 5g of ferric chloride and 3g of copper chloride at room temperature and put them into a dry and clean beaker; pour 100ml of concentrated hydrochloric acid with a volume percentage of 36.5%, and continue stirring with a glass rod; then pour in a volume percentage of 95% % anhydrous ethanol 100ml, continue to stir with a glass rod until the solid powder is completely dissolved; let it stand for at least 5min.
[0021] Sample preparation: Use a cutting machine to cut metallographic samples of K213 nickel-based alloys; use grinding wheels or coarse sandpaper to chamfer each side and edge of the samples; use metallographic water sandpaper of different sizes to grind the samples, The sample was ground successively by 220 mesh, 400 mesh, 800 mesh and 1000 mesh metallographic water sandpaper; the sample...
Embodiment 2
[0023] Example 2: The metallographic etchant for K418 nickel-based alloy (with a nickel content of about 72% to 76%) and the method of use are as follows.
[0024] Corrosive agent preparation: Weigh 5g of ferric chloride and 3g of copper chloride at room temperature and put them into a dry and clean beaker; pour 100ml of concentrated hydrochloric acid with a volume percentage of 36.5%, and continue stirring with a glass rod; then pour in a volume percentage of 95% Add 50ml of absolute ethanol, stir continuously with a glass rod until the solid powder is completely dissolved; let stand for at least 5min.
[0025] Sample preparation: use a cutting machine to cut metallographic samples of K418 nickel-based alloy; use grinding wheels or coarse sandpaper to chamfer each side and edge of the sample; use metallographic water sandpaper of different particle sizes to grind the sample, metallographic The sample was ground successively by 220 mesh, 400 mesh, 800 mesh and 1000 mesh metall...
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