GB/T 3246.1-2012 English PDF (GBT3246.1-2012)

This Part of GB/T 3246 specifies the test solution and sample preparation, etching, anodized film formation, structure inspection, grain size determination and test report, etc. for microstructure detection of aluminum and aluminum alloy ingots (or billets), wrought aluminum and aluminum alloy plates, strips, foils, tubes, rods, profiles, wires, forgings (hereinafter referred to as processed products). This Part applies to the microstructure inspection of aluminum and aluminum alloy ingots (or billets) and processed products. 2 Test solutions 2.1 Nitric acid solution (1+4). 2.2 Perchloric acid ethanol solution (1+9). 2.3 Nitric acid solution (1+2.5) ~ nitric acid solution (1+1). 2.4 Etching agent No. 1: hydrofluoric acid solution (1+200). 2.5 Etching agent No. 2: hydrofluoric acid solution (1+1). 2.6 Etching agent No. 3: phosphoric acid solution (1+9). 2.7 Etching agent No. 4: sulfuric acid solution (1+9) ~ sulfuric acid solution (2+8). 2.8 Etching agent No. 5: nitric acid solution (1+3). 2.9 Etching agent No. 6: mix hydrofluoric acid (¦Ñ 1.15 g/mL), hydrochloric acid (¦Ñ 1.19 g/mL), nitric acid (¦Ñ 1.40 g/mL) and water in a volume of (2+3+5+190); mix well. 2.10 Etching agent No. 7: mix hydrofluoric acid (¦Ñ 1.15 g/mL), hydrochloric acid (¦Ñ 1.19 g/mL), nitric acid (¦Ñ 1.40 g/mL) and water in a volume of (2+1+1+76); mix well. 2.11 Etching agent No. 8: mix hydrofluoric acid (¦Ñ 1.15 g/mL), hydrochloric acid (¦Ñ 1.19 g/mL), nitric acid (¦Ñ 1.40 g/mL) and water in a volume of (2+3+5+250); mix well. GB/T 3246.1-2012 www.ChineseStandard.net ? Buy True-PDF ? Auto-delivery. Page 6 of 29 2.12 Nitric acid solution (1+19) ~ nitric acid solution (1+3). 2.13 Sulfuric acid-phosphoric acid solution: mix sulfuric acid (¦Ñ 1.84 g/mL), phosphoric acid (¦Ñ 1.70 g/mL) and water in a volume of (38+43+19); mix well. 2.14 Fluoroboric acid solution (25 g/L). 2.15 Fluoroboric acid solution (16.8 g/L): weigh 117 g of boric acid into a plastic container; add 500 mL of water and 333 mL of hydrofluoric ...