The electroplating process generally includes three stages of pre-plating treatment, electroplating and post-plating treatment.
The purpose of the pre-treatment is to obtain a good coating. Since the plating parts are attached to the surface of the plating member during the manufacturing, processing, transportation and storage, dirt, oxide scale, hydroxide, dust and the like may adhere to the surface of the plating member. Electroplating with dirt will not result in good plating. It has been proved that peeling, blistering, spotting, poor corrosion resistance, etc. of the plating layer are often caused by improper pretreatment. Therefore, pretreatment plays an important role in the electroplating process.
The pretreatment steps before plating are as follows:
The first step is to achieve a certain surface roughness, which can be achieved by surface polishing, polishing and other processes.
In the second step, the grease can be removed by solvent dissolution and chemical or electrochemical methods.
The third step, derusting, can be rusted by mechanical, pickling and electrochemical methods.
In the fourth step, the activation treatment is generally carried out in a weak acid for a certain period of time to perform pre-plating activation treatment.
The complete electroplating process includes post-plating treatment. It can be said that all electroplated layers are post-treated after electroplating. The simplest post-treatment includes hot water cleaning and drying, and many coatings require dehydrogenation, polishing, and blunt Post-treatment, such as chemical, coloring, dyeing, sealing, painting, etc., depending on the purpose or design purpose of the metal, the post-treatment can be divided into three categories, namely, improving or enhancing protection, decoration and functionality.
(1) Protective post-treatment
In addition to chrome plating, all other protective coatings, if applied as a surface coating, must be suitably post-treated to maintain or enhance their protective properties. The most common post-processing method is the passivation method. For the protection requirements, surface coating treatment, such as varnish treatment, can be used. In terms of environmental protection and cost, water-based clear coating can be used.
(2) Decorative post-processing
Decorative post-treatment is a more common process in non-metal plating. Such as imitation gold, imitation silver, antique copper, brushing, coloring or dyeing and other artistic treatments. Most of these treatments also require the surface to be recoated with a clear varnish. Sometimes you need to use color transparent paint, such as paints in colors such as gold, red, green, and purple.
(3) Functional post-processing
Some non-metallic plating products are designed for functional needs and require some functional handling after plating. For example, it is used as a surface coating film of a magnetic shielding layer, as a surface solder coating of a solder plating layer, or the like.
The purpose of the pre-treatment is to obtain a good coating. Since the plating parts are attached to the surface of the plating member during the manufacturing, processing, transportation and storage, dirt, oxide scale, hydroxide, dust and the like may adhere to the surface of the plating member. Electroplating with dirt will not result in good plating. It has been proved that peeling, blistering, spotting, poor corrosion resistance, etc. of the plating layer are often caused by improper pretreatment. Therefore, pretreatment plays an important role in the electroplating process.
The pretreatment steps before plating are as follows:
The first step is to achieve a certain surface roughness, which can be achieved by surface polishing, polishing and other processes.
In the second step, the grease can be removed by solvent dissolution and chemical or electrochemical methods.
The third step, derusting, can be rusted by mechanical, pickling and electrochemical methods.
In the fourth step, the activation treatment is generally carried out in a weak acid for a certain period of time to perform pre-plating activation treatment.
The complete electroplating process includes post-plating treatment. It can be said that all electroplated layers are post-treated after electroplating. The simplest post-treatment includes hot water cleaning and drying, and many coatings require dehydrogenation, polishing, and blunt Post-treatment, such as chemical, coloring, dyeing, sealing, painting, etc., depending on the purpose or design purpose of the metal, the post-treatment can be divided into three categories, namely, improving or enhancing protection, decoration and functionality.
(1) Protective post-treatment
In addition to chrome plating, all other protective coatings, if applied as a surface coating, must be suitably post-treated to maintain or enhance their protective properties. The most common post-processing method is the passivation method. For the protection requirements, surface coating treatment, such as varnish treatment, can be used. In terms of environmental protection and cost, water-based clear coating can be used.
(2) Decorative post-processing
Decorative post-treatment is a more common process in non-metal plating. Such as imitation gold, imitation silver, antique copper, brushing, coloring or dyeing and other artistic treatments. Most of these treatments also require the surface to be recoated with a clear varnish. Sometimes you need to use color transparent paint, such as paints in colors such as gold, red, green, and purple.
(3) Functional post-processing
Some non-metallic plating products are designed for functional needs and require some functional handling after plating. For example, it is used as a surface coating film of a magnetic shielding layer, as a surface solder coating of a solder plating layer, or the like.
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