GB11109-89 Aluminum and Aluminum Alloy Anodizing-Terminology

< br / > this standard is equivalent to the international standard iso7583-1986 anodizing of aluminium and aluminium alloys - vocabulary< br / > 1Subject content and scope of application < br / > this standard specifies the terms and definitions of surface pretreatment, anodizing and chemical oxidation, coloring and hole sealing, inspection, defect and other five aspects in the oxidation treatment of aluminum and aluminum alloy< br / > this standard is applicable to anodizing of aluminum and aluminum alloy < br / > 2Surface pretreatment < br / > (1) brightening the metal surface by chemical or electrochemical polishing< br / > (2) after bright dipping, the surface of the metal will be bright< br / > (3) the process of polishing to reduce the surface roughness of metal< br / >The abrasive used on the wheel is suspension, paste or viscous grease containing fine abrasive particles< br / >< br / > (6) electropolishing aluminum is treated as anode in proper electrolyte< br / > (7) electrolytic etching etching of aluminium in a suitable solution by electrolysis< br / > (8) chemical brightening the treatment of surface brightening of chemical brightening aluminum by immersion in solution< br / >< br / >< br / >< br / > (12) the treatment method of cleaning with weak acid, weak alkali solution, solvent and its vapor to remove the surface grease and dirt This treatment can be chemical or electrolytic < br / > < br / > (14) deoxidizing to remove the oxide on the surface < br / > (15) etch etch, etch the surface of metal material in acid or alkaline solution, because the surface is completely or partially dissolved, it will be roughened The acid etching process can be carried out with or without electricity This method can also be used in special production processes such as electrolytic capacitor aluminum foil, printed circuit board and decorative structure < br / > < br / > < br / > < br / > < br / > (20) spray grinding abrasiveblasting the treatment method that corundum or glass sand is shot to the object surface with air flow Fine abrasives suspended in water or other liquids can also be used for abrasive blasting (wet or steam) < br / > < br / > < br / > (23) sandblasting: sandblasting with sand or alumina < br / > < br / > (25) the transition of activation surface from passive state to active state < br / > (26) the phenomenon that the capacity of dye adsorption increases after acid treatment of the reactivation (of anodicaoxidating) anodizing film < br / > < br / > 3 Anodizing and chemical oxidation < br / > < br / > (1) anodizing, anodicoximation In this process, the surface of aluminum or aluminum alloy is usually transformed into an oxide film, which has protective, decorative and other functional characteristics < br / > (2) anode1) in the process of electrolysis, negative ions are discharged to form positive ions or other electrodes for oxidation reaction 2) An object capable of doing so < br / > (3) cathode cathode1) in the process of electrolysis, positive ions are discharged to form negative ions or other reduction electrodes 2) An object capable of doing so < br / > (4) auxiliary electrode in the process of electrolysis, the additional anode or cathode is used to make the current evenly distributed < br / > (5) current density is the current intensity per unit surface area of the object Generally, ampere per square meter or decimeter per square (A / M2A / DM2) is used < br / > (6) critical current density a specific current density value in electrolysis When it is higher or lower than this value, different and sometimes undesirable reactions will occur < br / > (7) current efficiency the ratio of the effective current consumed by the formation of oxide film in the process of current efficiency anodizing to the theoretical current calculated by Faraday's law Usually expressed as a percentage < br / > (8) anode efficiency < br / > < br / > 1) generally refers to the current efficiency in a specific anode process < br / > < br / > < br / > < br / > < br / > < br / > < br / > (11) sulfuric acid anodizing < br / > < br / > (12) chromic acid anodizing Mainly used in aviation < br / > < br / > < br / > < br / > The film has good wear resistance < br / > < br / > (15) self colouring anodizing uses an appropriate electrolyte (usually based on organic acid) to make aluminum form a colored oxide film during anodizing < br / > < br / > < br / > < br / > Small aluminum parts are pressed into baskets or barrels as anodes, and acid electrolyte circulates between parts < br / > < br / > (18) constant voltage anodizing < br / > < br / > < br / > < br / > (20) barrier layer anodizing barrierla < br / > yeranodizing produces a thin and dense oxide film on aluminum This method is usually used to make electrolytic capacitors < br / > < br / > (21) barrier layer barrierla < br / > yer is a thin porous aluminum oxide layer (0.01-0.07um) close to the metal surface It is different from the main part of oxide film with porous structure < br / > < br / > < br / > < br / > (23) the structure of anodic oxide film is usually composed of hexagonal structure with central hole, and a thin barrier layer is between the aluminum surface and the porous oxide layer as the main body < br / > It has a small hole in its heart, which is directly connected to the barrier layer on the surface of aluminum The hole wall is relatively dense oxide < br / > < br / > < br / > < br / > (26) the process of electrochemical reaction on the electrode where the current flows through the electrolyte < br / > < br / > < br / > (28) the electrolysis method of periodic commutation with periodic commutation current < br / > < br / > < br / > (30) thief, a shunt electrode, is an auxiliary electrode placed at a specific position It can transfer part of the current on some parts of the workpiece to avoid high local current density < br / > < br / > < br / > < br / > < br / > (33) chemical conversion coating aluminum is immersed in alkaline or acidic oxidizing solution, and a layer of film (mostly oxide film) is formed on its surface through chemical reaction This film is commonly used in the painting of aluminum substrate < br / > < br / > < br / > < br / > < br / > When anodized, it can be made of aluminum or titanium < br / > It plays an auxiliary role in filtration to prevent excessive accumulation of filter slag on the main filter < br / > < br / > For example, the treatment of an unsealed anodized film immersed in a suitable colorant < br / > < br / > Commonly used are dyes (organic or inorganic), pigments and metal salts < br / > < br / > < br / > < br / > (4) dyestuff can dye its own color to other materials (such as anodized film), usually soluble or insoluble organic compounds (coloring substances) < br / > < br / > < br / > < br / > (6) the porous structure of Electrocoloring anodized film is colored due to electrodeposition of metal or metal oxide < br / > < br / > < br / > < br / > (8) discoloration bleding is caused by the dissolution of dye in the anodized film For example, the dissolution of dye (pigment) during the sealing process < br / > < br / > (9) the anodized film is treated by adsorption, chemical reaction or other mechanisms to increase the pollution resistance, corrosion resistance, improve the durability of the color of the oxide film and achieve the required other properties < br / > < br / > < br / > < br / > Nickel acetate is mainly used < br / > < br / >