Electro-galvanizing environment-friendly passivation solution and using method thereof
A technology of electro-galvanizing and passivation solution, applied in the direction of metal material coating process, etc., can solve the problems of low economic benefit and poor corrosion resistance, and achieve the effect of improving economic benefit, excellent performance and improving corrosion resistance
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Examples
Embodiment 1
[0016] Electro-galvanizing environmental protection passivation solution is composed of the following components:
[0017] Sodium silicate 10g / L, H 2 SO 4 2mL / L,
[0018] TiCl 3 0.5g / L, H 2 o 2 20mL / L,
[0019] Mg(NO 3 ) 2 20g / L, the rest is H 2 O;
[0020] The pH is 1.5. (with concentrated H 2 SO 4 solution to adjust the pH value)
[0021] The passivation solution is used for silicate passivation treatment on screws and nuts. Before electroplating, screws and nuts are subjected to pre-treatments such as grinding, derusting, degreasing, activation, etc., and then put into electroplating bath for electroplating. The bath composition and operating conditions of the galvanizing process are: ZnCl 2 80g / L, NaCl200g / L, boric acid 30g / L, appropriate amount of galvanizing additives, the pH value of the plating solution is maintained at 4.5, and the current density is 1.5A / dm 2 , the temperature is room temperature, and the plating time is 20 minutes.
[00...
Embodiment 2
[0025] Electro-galvanizing environmental protection passivation solution is composed of the following components:
[0026] Potassium silicate 15g / L, H 2 SO 4 3mL / L,
[0027] TiCl 3 1g / L, H 2 o 2 15mL / L,
[0028] Mg(NO 3 ) 2 35g / L, the rest is H 2 O;
[0029] The pH value is 2. (Adjust pH with NaOH solution)
[0030] The passivation solution is used for silicate passivation treatment after electroplating Zn with an oil cylinder of an automobile engine. The steel pipe is electroplated after pretreatment (rust removal, degreasing, activation). The composition and operating conditions of the zinc-iron alloy electroplating process are: NaOH100g / L, ZnCl 2 10g / L, appropriate amount of additives, pH value 12.5, cathode current density 1.7A / dm 2 , The temperature is room temperature, and the electroplating time is 60 minutes.
[0031] Rinse the galvanized steel pipe with water, and then put the concentration of 2% HNO 3 In the aqueous solution, soak for 1 sec...
Embodiment 3
[0034] Electro-galvanizing environmental protection passivation solution is composed of the following components:
[0035] Potassium silicate 30g / L, H 2 SO 4 5mL / L,
[0036] TiCl 3 1.5g / L, H 2 o 2 5mL / L,
[0037] Mg(NO 3 ) 2 50g / L, the rest is H 2 O;
[0038] The pH value is 4. (with concentrated H 2 SO 4 solution to adjust the pH value)
[0039] The passivation solution is used for passivation treatment after the overall galvanizing of large steel plates. Large steel plates are electroplated after pretreatment (rust removal, degreasing, activation), and the bath composition and operating conditions of the galvanizing process are: ZnCl 2 70g / L, KCl190g / L, appropriate amount of additives, pH value 5.5, cathode current density 1.8A / dm 2 , The temperature is room temperature, and the electroplating time is 50 minutes.
[0040] Rinse the galvanized steel plate with water, and then put in 3% HNO 3 In the aqueous solution, soak for 15 seconds at room tem...
PUM
Login to View More Abstract
Description
Claims
Application Information
Login to View More