CN101920243A - Method for manufacturing imitating silver on surface of steel product - Google Patents

Abstract

The invention relates to a method for manufacturing imitating silver on the surface of a steel product, which comprises the following steps: (a) removing oil and rust, phosphatizing and inactivating; (b) spraying anti-corrosive primer, wherein the primer is epoxy polyester powder and is sprayed by an electrostatic method; (c) baking after finishing the spray, wherein the baking temperature is 200-220 DEG C, and the baking time is 15-30 minutes; (d) supplementing ash, naturally drying in the air, and sanding; (e) spraying PU primer, wherein the spraying time is 10-20 seconds; (f) baking after finishing the spray, wherein the baking temperature is 80-100 DEG C, and the baking time is 15-30 minutes; (g) carrying out wire-drawing on the surface; (h) spraying PU silver paint, wherein the spraying time is 5-10 seconds; (i) spraying PU finish coat, wherein the spraying time is 10-20 seconds; and (j) baking after finishing the spray, wherein the baking time is 80-100 DEG C, and the baking time is 15-30 minutes. The method can enhance the antirust capability and the decoration of the surface of the common steel product.

Description

A kind of method for manufacturing imitating silver on surface of steel product

Technical field

The present invention is the method for manufacturing imitating silver of a kind of method for manufacturing imitating silver, particularly a kind of steel surface.

Technical background

It is the substitute of rare precious metals silver that the imitative silver in surface is handled metal, it is a primary raw material with cheap metal, by surface treatment, make itself and fine silver have beautiful silvery white appearance, and the imitative silver in surface is handled and is had than fine silver more superior corrosion resistance energy, anti-wear performance and elastic strength.General steel, for example cold-rolled steel, hot-rolled steel etc., though the cost of raw material is low, its outward appearance reason such as be easy to get rusty makes it ornamentally greatly descend, and is difficult to satisfy the noble elegant decoration of high-grade facilities such as hall, hotel, hotel.

Summary of the invention:

The preparation method that the objective of the invention is to overcome above-mentioned shortcoming and a kind of imitative silver of steel surface is provided.The present invention can make the common iron appearance looks elegant, and the surface can be antirust, and cost is low.

For achieving the above object, the preparation method of the imitative silver of steel surface of the present invention may further comprise the steps:

A) degreasing and rust removal;

B) phosphatization;

C) passivation; Used passivating solution is 5% potassium bichromate;

D) spray anti-corrosive primer; Used priming paint is the epoxy polyester powder, sprays with electrostatic methods;

E) be coated with the back baking; Baking temperature is 200 ℃～220 ℃, and stoving time is 15～30 minutes;

F) mend ash; With the atom ash blemish is filled up;

G) dry naturally; Used flash-off time is more than 4 hours;

H) frosted; Successively with 100# coarse sandpaper and the polishing of 400# fine sandpaper;

I) spray PU priming paint; Spray time is 10～20 seconds;

J) spray back oven dry; Bake out temperature is 80 ℃～100 ℃, and drying time is 15～30 minutes;

K) surperficial wire drawing;

L) spray PU silver lacquer; Spray time is 5～10 seconds;

M) spray PU finish paint; Spray time is 10～20 seconds

N) spray back oven dry; Bake out temperature is 80 ℃～100 ℃, and drying time is 15～30 minutes;

Described surperficial wire drawing can be made straight burr, random line or ripple according to decorating needs.

The present invention since earlier to steel surface clean, phosphatization, passivation procedure, on its surface spray anti-corrosive primer thereafter, through frosted, the rear surface wire drawing of spray PU priming paint, spray PU silver lacquer and PU finish paint again, therefore, can make the common iron appearance elegant in appearance, its surperficial antirust ability greatly be improved, and can resist the pollution of dirts such as finger-marks; In addition, its cost is well below the cost of fine silver.

The specific embodiment

Embodiment 1: the steel workpiece is after degreasing and rust removal, phosphatization, passivation procedure, with electrostatic methods rust prevention by applying liquid material priming paint, 200 ℃ of bakings 20 minutes.Through mending ash, dry, spraying 20 seconds PU priming paint again after the frosted,, process the straight line lines at surface of the work then 80 ℃ of bakings 30 minutes.Earlier after PU silver lacquer spraying 5 seconds, the spraying of PU finish paint after 10 seconds were placed on workpiece in about 80 ℃ baking oven 30 minutes, coating is fully hardened, the steel surface of the work forms a kind of decorating film of uniformly imitative silver-colored effect.

Embodiment 2: the steel workpiece is after degreasing and rust removal, phosphatization, passivation procedure, with electrostatic methods rust prevention by applying liquid material priming paint, 220 ℃ of bakings 15 minutes.Through mending ash, dry, spraying 10 seconds PU priming paint again after the frosted,, process random strain line road at surface of the work then 100 ℃ of bakings 15 minutes.Earlier after PU silver lacquer spraying 8 seconds, the spraying of PU finish paint after 20 seconds were placed on workpiece in about 100 ℃ baking oven 20 minutes, coating is fully hardened, the steel surface of the work forms a kind of decorating film of uniformly imitative silver-colored effect.

Embodiment 3: the steel workpiece is after degreasing and rust removal, phosphatization, passivation procedure, with electrostatic methods rust prevention by applying liquid material priming paint, 200 ℃ of bakings 30 minutes.Through mending ash, dry, spraying 15 seconds PU priming paint again after the frosted,, process the waveform lines at surface of the work then 90 ℃ of bakings 20 minutes.Earlier after PU silver lacquer spraying 10 seconds, the spraying of PU finish paint after 10 seconds were placed on workpiece in about 90 ℃ baking oven 30 minutes, coating is fully hardened, the steel surface of the work forms a kind of decorating film of uniformly imitative silver-colored effect.

Embodiment 4: the steel workpiece is after degreasing and rust removal, phosphatization, passivation procedure, with electrostatic methods rust prevention by applying liquid material priming paint, 210 ℃ of bakings 15 minutes.Through mending ash, dry, spraying 20 seconds PU priming paint again after the frosted,, process the straight line lines at surface of the work then 85 ℃ of bakings 30 minutes.Earlier after PU silver lacquer spraying 6 seconds, the spraying of PU finish paint after 16 seconds were placed on workpiece in about 85 ℃ baking oven 25 minutes, coating is fully hardened, the steel surface of the work forms a kind of decorating film of uniformly imitative silver-colored effect.

Claims (2)

1. method for manufacturing imitating silver on surface of steel product may further comprise the steps:

A) degreasing and rust removal;

B) phosphatization;

C) passivation; Used passivating solution is 5% potassium bichromate;

D) spray anti-corrosive primer; Used priming paint is the epoxy polyester powder, sprays with electrostatic methods;

E) be coated with the back baking; Baking temperature is 200 ℃～220 ℃, and stoving time is 15～30 minutes;

F) mend ash; With the atom ash blemish is filled up;

G) dry naturally; Used flash-off time is more than 4 hours;

H) frosted; Successively with 100# coarse sandpaper and the polishing of 400# fine sandpaper;

I) spray PU priming paint; Spray time is 10～20 seconds;

J) spray back oven dry; Bake out temperature is 80 ℃～100 ℃, and drying time is 15～30 minutes;

K) surperficial wire drawing;

L) spray PU silver lacquer; Spray time is 5～10 seconds;

M) spray PU finish paint; Spray time is 10～20 seconds

N) spray back oven dry; Bake out temperature is 80 ℃～100 ℃, and drying time is 15～30 minutes;

2. described surperficial wire drawing can be made straight burr, random line or ripple according to decorating needs.