Pre-treatment method for electroplating iron-based hardware
A hardware and iron-based technology, which is applied in the field of pretreatment of iron-based hardware electroplating, can solve the problems of poor corrosion resistance, etc., and achieve the effect of uniform and beautiful coating, high anti-corrosion performance and excellent bonding performance
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[0007] The embodiment provided by the present invention is described in further detail:
[0008] The technical solution of the present invention is: a pretreatment method for electroplating iron-based hardware, comprising the steps of: (a) cleaning with an alkaline solution to remove oil stains on the surface of the iron-based hardware; (b) cleaning with an acidic solution to remove the iron-based hardware oxides on the surface of the hardware; (c) perform electrochemical polishing on the hardware; wherein, the chemical polishing solution used contains 100-110mL / L hydrogen peroxide, 200-260mL / L acetic acid, 130-320mL / L of concentrated nitric acid, 80-90g / L of sulfamic acid, 55-105mL / L of hydroxyethylidene diphosphonic acid and 20-30g / L of sodium dodecyl sulfate; lead electrodes are used as cathodes, hardware Perform electrochemical treatment for the anode, the time is 20-40min, and the current density is 9-20A / dm2.
[0009] Preferably, the chemical polishing solution contain...
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