Plastic Plating-Chromium Plating Process And Test Method For Automobile Exterior Decoration

Plastic plating-Chromium plating process and test method for automobile exterior decoration.
Huizhou Boluo Tenglong Technology Co., Ltd. serves you wholeheartedly! Mainly engaged in plastic hydroelectroplating processing, with plastic injection molding processing, mold processing and so on!
In today's society, many cars are decorated with electroplating technology, which can not only add a sense of fashion to the car lamps, but also make the car as a whole full of advanced sense. However, because the electroplated parts on the car are usually exposed outdoors, and have to go through a variety of environmental tests, so the automobile external plating parts need very strict process and evaluation standards. General automobile lamps and lanterns will choose electroplating types according to the use conditions, which are specifically divided into four types: grade U, the use conditions are harsh, the applicable examples are external parts; grade S, the use conditions are strict, the applicable cases are external parts; grade A, the use conditions are ordinary, the applicable examples are external parts; grade B, the use conditions are relaxed, and the applicable examples are internal parts. Below, the electroplating process and test methods of chromium plating for decoration on Japanese taillights are described in detail.
1 types of electroplating.
The type of electroplating for car lamp decoration in A Society is grade S, the use condition is strict, the applicable example is external parts, and the type of material is plastic.
2 electroplating quality.
2.1 Electroplating method.
Electroplating method makes copper, nickel, chromium and other elements attached to the surface by electrolysis on the substrate to make it have a metallic luster. In addition, the nickel layer is also subdivided into several electroplating methods, this lamp uses electroplating method is 2 heavy nickel or 3 heavy nickel + dispersed stress (nickel seal), micro-hole chromium. In the case of 2 heavy nickel and 3 heavy nickel, the thickness of semi-glossy nickel layer is not less than 1 × 2 of the total thickness of nickel layer.
2.2 minimum thickness of coating.
The thickness measurement is based on the microscope method, and can also be measured by the electrolytic film thickness meter. In addition, only for chromium, fluorescent X-ray film thickness meter can also be used. In principle, the measuring part of the coating thickness should be the minimum thickness. However, when the thickness of the coating is uneven due to the shape of the plated parts, the measuring position can be changed through negotiation between the parties. Except for zinc alloy and aluminum alloy substrate, nickel plating can be used instead of copper plating. The thickness of copper should ensure the appearance and hot and cold circulation. Although the shape, size, forming conditions and other substrate conditions are different, at least the thickness of the copper layer at the measuring point should be more than twice the thickness of the nickel layer. The minimum thickness of nickel coating and the minimum thickness of chromium coating also have different regulations according to the use environment.
2.3 externality.
Under indoor light, visual inspection was carried out from the 500mm of the test surface. The surface of the coating should be smooth and glossy, free of stains, bulging, wounds, cuts, material exposure, trachoma, non-smooth and other abnormal phenomena. However, it does not apply to the parts of the vehicle that are not visible. The limit sample is determined by negotiation between the parties, and the limit is the degree to which the vehicle condition is visually inspected by 50cm in the sun, and the appearance defect is not obvious.
2.4 corrosion resistance.
Brine spray test (SST): continuous according to JISZ2371 or ASTMB117. For class S and A, it is qualified if it does not rust without flying stone test. The weathering resistance test of S-grade electroplating process is more than 48 hours.
Skin corrosion resistance test (CASS): according to JISH8502 or ASTMB368. Interval 50cm visual rust (surface rust), discoloration, etc. The corrosion resistance test of S-grade electroplating process is more than 60 hours.
2.5 Hot and cold cyclicity.
For S grade, the base material is plastic, according to the following test method, the hot and cold cycle is more than 4, and the effective surface does not expand, peel or split after the test. Hot and cold cycle test method: the condition in Table 6 is one cycle, which is placed for more than 48 hours after electroplating in principle. Note 10 shall be decided by the parties through consultation.

3 conclusion.
As China has a wide territory and different weather environment, it is not a small test for the external electroplating parts of the car body, and how to enhance the management of electroplating quality is also one of the important topics for all vehicle factories and parts factories. only if we want to determine all kinds of possible use environment and carry out more severe experimental evaluation, can we always maintain the bright color of the electroplating parts and become the bright spot on the car.Plastic plating-Chromium plating process and test method for automobile exterior decoration.
Huizhou Boluo Tenglong Technology Co., Ltd. serves you wholeheartedly! Mainly engaged in plastic hydroelectroplating processing, with plastic injection molding processing, mold processing and so on!
In today's society, many cars are decorated with electroplating technology, which can not only add a sense of fashion to the car lamps, but also make the car as a whole full of advanced sense. However, because the electroplated parts on the car are usually exposed outdoors, and have to go through a variety of environmental tests, so the automobile external plating parts need very strict process and evaluation standards. General automobile lamps and lanterns will choose electroplating types according to the use conditions, which are specifically divided into four types: grade U, the use conditions are harsh, the applicable examples are external parts; grade S, the use conditions are strict, the applicable cases are external parts; grade A, the use conditions are ordinary, the applicable examples are external parts; grade B, the use conditions are relaxed, and the applicable examples are internal parts. Below, the electroplating process and test methods of chromium plating for decoration on Japanese taillights are described in detail.
1 types of electroplating.
The type of electroplating for car lamp decoration in A Society is grade S, the use condition is strict, the applicable example is external parts, and the type of material is plastic.
2 electroplating quality.
2.1 Electroplating method.
Electroplating method makes copper, nickel, chromium and other elements attached to the surface by electrolysis on the substrate to make it have a metallic luster. In addition, the nickel layer is also subdivided into several electroplating methods, this lamp uses electroplating method is 2 heavy nickel or 3 heavy nickel + dispersed stress (nickel seal), micro-hole chromium. In the case of 2 heavy nickel and 3 heavy nickel, the thickness of semi-glossy nickel layer is not less than 1 × 2 of the total thickness of nickel layer.
2.2 minimum thickness of coating.
The thickness measurement is based on the microscope method, and can also be measured by the electrolytic film thickness meter. In addition, only for chromium, fluorescent X-ray film thickness meter can also be used. In principle, the measuring part of the coating thickness should be the minimum thickness. However, when the thickness of the coating is uneven due to the shape of the plated parts, the measuring position can be changed through negotiation between the parties. Except for zinc alloy and aluminum alloy substrate, nickel plating can be used instead of copper plating. The thickness of copper should ensure the appearance and hot and cold circulation. Although the shape, size, forming conditions and other substrate conditions are different, at least the thickness of the copper layer at the measuring point should be more than twice the thickness of the nickel layer. The minimum thickness of nickel coating and the minimum thickness of chromium coating also have different regulations according to the use environment.
2.3 externality.
Under indoor light, visual inspection was carried out from the 500mm of the test surface. The surface of the coating should be smooth and glossy, free of stains, bulging, wounds, cuts, material exposure, trachoma, non-smooth and other abnormal phenomena. However, it does not apply to the parts of the vehicle that are not visible. The limit sample is determined by negotiation between the parties, and the limit is the degree to which the vehicle condition is visually inspected by 50cm in the sun, and the appearance defect is not obvious.
2.4 corrosion resistance.
Brine spray test (SST): continuous according to JISZ2371 or ASTMB117. For class S and A, it is qualified if it does not rust without flying stone test. The weathering resistance test of S-grade electroplating process is more than 48 hours.
Skin corrosion resistance test (CASS): according to JISH8502 or ASTMB368. Interval 50cm visual rust (surface rust), discoloration, etc. The corrosion resistance test of S-grade electroplating process is more than 60 hours.
2.5 Hot and cold cyclicity.
For S grade, the base material is plastic, according to the following test method, the hot and cold cycle is more than 4, and the effective surface does not expand, peel or split after the test. Hot and cold cycle test method: the condition in Table 6 is one cycle, which is placed for more than 48 hours after electroplating in principle. Note 10 shall be decided by the parties through consultation.

3 conclusion.
As China has a wide territory and different weather environment, it is not a small test for the external electroplating parts of the car body, and how to enhance the management of electroplating quality is also one of the important topics for all vehicle factories and parts factories. only if we want to determine all kinds of possible use environment and carry out more severe experimental evaluation, can we always maintain the bright color of the electroplating parts and become the bright spot on the car.