电镀小常识（Plating tips）
查济Plating tips
1.1 plating
The process of depositing a metal or alloy on the surface of a workpiece to form a uniform, den and adhesive metal layer by electrolysis
1.2 pretreatment
The part before the treatment, to some extent burr and oil stain, some rious corrosion, which brings great difficulties to the middle, additional resistance to chemical or electrochemical process, sometimes even parts of local or whole surface coating or film cannot be obtained, but also pollute the electrolyte, affect the quality of the surface treatment layer. It includes degreasing, etching, polishing, polishing, polishing, blowing sand, partial protection, mounting and adding auxiliary electrodes, etc..
1.3 intermediate processing
It is the main stage to give the expected performance of parts, the core of surface treatment, and the quality of surface treatment mainly depends on the processing at this stage.
1.4 postprocessing
It is the auxiliary treatment of film and coating.
2. Basic terms in electroplating process
幼儿园离园活动2.1 anode
贺年词An electrode that accepts an electron given by a reactant; an electrode that produces an oxidation reaction.
2.2 cathode
An electrode on which electrons are obtained, i.e., an electrode for a reduction reaction. Usually expresd as a percentage.
机箱风扇声音大2.3 cathodic coating
The algebraic value of electrode potential than the big metal matrix metal coating.
2.4 anodic coating
The electrode potential value of algebraic metal coating than the ba metal small.
2.5 stripping
一马当先的意思The process of removing the coating on the surface of the workpiece.
2.6 before plating treatment
In order to expo the real surface of the material, eliminate
the internal stress and other special purpos, remove the oil, oxide and internal stress and other pre - treatment techniques.
2.7 after plating treatment
In order to enhance the protective properties of the plating, to improve the decorative properties and other special purpos (such as passivation, hot melt, aling and degassing, etc.).
镓的价格
2.8 anode bag
cad注册表
Made of cotton or synthetic fabric sheathed on an anode to prevent anode sludge from entering a ba
g for solution.
2.9 rack (fixture)
A tool for hanging parts so as to allow parts to be placed in a groove for electroplating or other treatment.对错符号
2.10 moving cathode
A cathode for periodic reciprocating motion of a plated object with pole bars by means of a mechanical device.
What is phosphating? What's the u of phosphating?
The process of treating a metal surface containing phosphoric acid, phosphate, and other metal salts to make the metal surface react chemically to produce a complete, intermediate corrosion resistant phosphating film. Phosphating.
Phosphating film can reduce the friction resistance of metal parts during stamping and improve the adhesion between spray coating and substrate. For example, the stamping blank should be phospha
ting first, then plastic deformation, and the electrophoresis candidate should be phosphating before the paint is applied.
Why on the rack insulated?
In the electrolyte part of the hanger, in addition to the conductive parts in contact with the workpiece, shall be insulated. Otherwi, there will be metal deposits at the sites,
It will cau unnecessary loss of electric energy and metal, and will cau abnormal current distribution, uneven coating and even partial plating. According to statistics, by not hanging insulation treatment, to consume more than 5%-20% metal and the corresponding electric energy, and the removal of the coating on the rack, the need for chemical method or electrolysis by mechanical stripping method, but also shorten the rvice life of the hanger.
What is the function of the anode bag? What items should be paid attention to when using?
Anode anodes are often applied to the anode to prevent anode slime from entering the electrolyte when it is dissolved, resulting in coar coating or pinholes. Materials for making anode bags should be chemically stable in the electrolyte ud. In order to make the anode bag work reliably, the lower half
of the anode bag can be made into double layers, and the upper end of the anode bag should be at a certain distance from the liquid surface so as to facilitate the exchange of electrolyte inside and outside the bag. The anode bags should t in the anode basket (or frame), anode basket (or frame) with insoluble metal or plastic, with a metal frame to the attention of insulation (conductive effect and dissolved materials, such as nickel and titanium basket Yang). Becau of the u of an anode bag, the resistance is incread when the current pass through, and the tank voltage is raid. Therefore, the anode bag should be cleaned once every 1-2 months.
What are the common faults in electroless copper plating and after plating of plastic parts? How to solve?
Plastic parts, electroless copper plating and after plating, the caus of common failures and solutions are outlined below:
1, after roughening treatment, the water is not wetted, and the bonding ability between electroless copper plating layer and substrate is poor.
A: inadequate roughening,
Roughening solutions and treatment temperatures should be analyzed and adjusted.
B: except oil is not good, adjust oil removal solution composition, temperature and oil removal time.
C: plastic parts are molded with improper relea agents, such
