Hardware Knowledge Church: You know how much knowledge plating – electroplating knowledge, electroplating – metal industry
Surface Treatment The basic process can be divided into three phases: pre-processing, intermediate processing and reprocessing.
Plating 1.1 Pre-treatment Parts before processing, there are varying degrees burrs and oil, and some severe corrosion, caused great difficulties to the intermediate processing, chemical or electrochemical process to add additional resistance, and sometimes even make partial or entire surface of the parts can not be obtain coating or film, but also pollution electrolyte, affect the quality of surface treatment layer. Include degreasing, etching, polishing, polishing, rolling light, blowing sand, local protection, racking, plus auxiliary electrode.
1.2 intermediate treatment Is to give the expected performance of various parts of the main stage, the core surface, surface quality is good or bad depends on the stage of processing.
1.3 post-processing Is supporting the coating film and processing.
Electroplating electroplating process terminology — the basic terminology
2.1 dispersion capacity Under certain conditions, a certain solution of the electrode (usually the cathode) layer current distribution than the initial distribution of the results obtained more uniform capacity. Also known as throwing power.
2.2 coverage Bath in the groove or hole under certain conditions the capacity of the depositional metal. Also known as the covering power.
2.3 Anode Acceptable given reactant Electronic Electrode, that electrode oxidation reaction.
2.4 insoluble anode By the current when the anodic reaction does not occur in the electrode.
2.5 Cathode Response to their gain electronic electrode, that electrode reduction reaction occurs.
2.6 current density Unit area of electrode by the current intensity, usually A/dm2 said.
2.7 current density range Access to qualified current density plating range.
2.8 Current efficiency Unit of electricity through the electrode, the first reaction product formed by the actual weight of the electrochemical equivalent ratio, usually expressed as a percentage.
2.9 cathodic coating Electrode potential of generation of value larger than the base metal coatings. Anodic coating
2.10 Electrode potential of generation of value smaller than the base metal coatings.
2.11 Anode Under the current after the anodic residues.
2.12 deposition rate Parts per unit time the thickness of metal deposited on the surface. Initial current distribution
2.13 Does not exist in the electrode polarization, the current distribution on the electrode surface.
2.14 activation State of the metal surface passivation effect disappeared.
2.15 passivation A certain environment to make the metal surface normal dissolution reaction has been seriously hampered, and compare a wide range of electrode potential of metal dissolution reaction speed to a very low effect.
2.16 hydrogen embrittlement As etching, electroplating and other processes as degreasing or metal or alloy caused by absorption of hydrogen brittleness.
2.17PH value Of hydrogen ion activity aH + negative common logarithm.
2.18 base material In the film deposited on metal or the formation of the material.
2.19 Auxiliary cathode To remove certain parts to be plated workpiece is too focused on power line as the emergence of illnesses such as burrs, and burning, plus a nearby area in the shape of the cathode, which consumes part of current, this additional cathode is the auxiliary cathode. Auxiliary anode
2.20 In addition to plating anodes for use by other than normal, were plated in order to improve the current distribution on the workpiece surface, using the auxiliary anode increases.
2.21 electrolysis Of electrolyte solution to the current passed in the anode and cathode lead to redox reactions.
2.22 polarization When the current through the electrode, the electrode potential deviate from the equilibrium potential of the phenomenon occurred.
2.23 Saponification Oil in alkaline hydrolysis. 2.24 cathodic polarization Direct current through the electrode, the cathode potential deviated from the equilibrium potential shifted to negative phenomena. Cell voltage
2.25 Electrolysis, the electrolytic cell the total potential difference between two poles.
Plating jargon – plating methods of the term
3.1 chemical passivation The workpiece on the processing solution containing the oxidant, so that a thin surface layer of passive protective film process.
3.2 Chemical Oxidation By chemical treatment of metal surface oxide film process.
3.3 Electrochemical Oxidation Some electrolyte to the anode of metal workpieces by electrolysis, on the workpiece surface layer of a protective, decorative or other function of oxide film process.
3.4 Electroplating Principle of using electrolysis, the metal or alloy deposited on the workpiece surface to form a uniform, compact, good adhesion of the metal layer process.
3.5 Conversion Coatings Of the metals formed by chemical or electrochemical treatment of the compound containing the metal surface of the film.
3.6 Steel Bluing (steel chemical oxidation)
The steel in heating or immersion in the air oxidation of the solution, so that the surface is usually blue (black) color of the thin oxide film process.
3.7 Surge Current Through the process of the instantaneous current-current.
3.8 bright plating
Under appropriate conditions, directly from the plating bath has a glossy coating of plating.
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