What reagent and type of attack should be used in metallographic testing of aluminum alloy samples, specifically ER 5183 wire?
Dear Samuel Monteiro Couto Cruz
Aluminium alloy ER5183 consists primarily of aluminium with small additions of magnesium and manganese. The magnesium content enhances the alloy's strength and weldability, while manganese contributes to its corrosion resistance. I this case etching solution "Wecks No. 1" is a specific type of etchant used primarily for etching aluminum and its alloys to reveal the grain boundaries and other microstructural features. The solution make up from: 10 grams potassium permanganate,1 gram sodium hydroxide and distilled water 250 ml < . The exposure time 10-60 seconds. Best regards...
Keller's Reagent would be appropriate. 95% H2O, 2.5% concentrated HNO3, 1.5% Concentrated HCl and 1% Concentrated HF
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