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DIRECT DYEING ANODIC OXIDATION PROCESS FOR PRODUCING BLUISH-GREY, CORNFLOWER BLUE, GREYISH-BLUE, DARK BLUE OXIDE LAYER OR OF ITS OWN GREY COLOUR, ON ALUMINIUM OR ITS ALLOYS
DIRECT DYEING ANODIC OXIDATION PROCESS FOR PRODUCING BLUISH-GREY, CORNFLOWER BLUE, GREYISH-BLUE, DARK BLUE OXIDE LAYER OR OF ITS OWN GREY COLOUR, ON ALUMINIUM OR ITS ALLOYS
The electrolyte comprises (g/l): 20-250 sulphuric acid, 0.1-30 alkaline hexacyano-ferrate (III). 0.1-10 hydrogen peroxide, 0.1-5 titanium sulphate, 1-20 boric acid, 2-100 citric acid and/or oxalic acid and additives. Voltage is 10-40V, and current density is 0.5-8.0 A/dm2 single current or 10-90 V and 0.5-10 A/dm2 alternative current. The resulting oxide powder layer is treated by hot or cold method.
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机译：电解质包含（g / l）：20-250硫酸，0.1-30碱性六氰基高铁酸盐（III）。 0.1-10过氧化氢，0.1-5硫酸钛，1-20硼酸，2-100柠檬酸和/或草酸和添加剂。电压为10-40V，电流密度为0.5-8.0 A / dm2单电流或10-90 V和0.5-10 A / dm2交流电。通过热或冷方法处理所得的氧化物粉末层。
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