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Aluminum passivation refers to: through the chemical reaction of aluminum and aluminum passivation liquid, the active aluminum metal surface becomes an inert surface, so as to prevent the reaction of external destructive substances with the metal surface and achieve the purpose of extending the rust time of aluminum. And aluminum after passivation treatment, it will generate a very dense, good coverage, firmly adsorbed on the metal surface of the aluminum passivation film, can play a role in extending the rust time of aluminum, effectively protect the purpose of metal, so that the metal more corrosion resistance. Dongguan Senyuan Chemical is specialized in the production of aluminum and aluminum alloy materials for surface cleaning agent, polishing agent, passivation agent, anti-rust agent manufacturers, the production of aluminum passivation liquid has been widely used in the country's major aluminum products manufacturers, the liquid stable performance, mature process, is to replace the traditional application of anti-rust oil and electroplating, painting and other surface anti-corrosion process of the best choice.
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Aluminum passivation process is very simple, suitable for all aluminum and aluminum alloy materials anti-corrosion and anti-oxidation treatment, usually only need to soak in the passivation solution for 1.5 minutes to complete the passivation process. Save time, effort and cost. The process of aluminum passivation is a complete chemical reaction process, which absolutely does not change the surface color, size and appearance of aluminum parts, and can form a protective film with good corrosion resistance on the surface. It can pass more than 200 hours of salt spray test without discoloration and oxidation. Aluminum passivation process is suitable for communication equipment, Marine aviation, industrial equipment, medical equipment, electronic products, auto and motorcycle parts, household items, construction projects and so on.
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The anodizing of aluminum is an electrolytic oxidation process in which the surface of aluminum and aluminum alloys is usually transformed into an oxide film, which has protective, decorative, and some other functional properties. Its purpose is to overcome the surface hardness of aluminum alloy, wear resistance and other defects, expand the scope of application, extend the service life, surface treatment technology has become an indispensable part of the use of aluminum alloy, and anodizing technology is currently the most widely used and the most successful.
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Such as surface coloring, improve corrosion resistance, enhance wear resistance and hardness, protect the metal surface. After anodizing aluminum or its alloy, improve its hardness and wear resistance, up to 250 ~ 500 kg\/mm2, good heat resistance, hard anodized film melting point up to 2320K, excellent insulation, breakdown resistance voltage up to 2000V, enhance the corrosion resistance. The oxide film has a large number of microholes in the thin layer, which can absorb various lubricants and is suitable for manufacturing engine cylinders or other wear-resistant parts; The membrane has strong adsorption capacity and can be colored into a variety of beautiful and gorgeous colors. Non-ferrous metals or their alloys (such as aluminum, magnesium and their alloys, etc.) can be anodized, which is widely used in mechanical parts, aircraft and automotive parts, precision instruments and radio equipment, daily necessities and architectural decoration.
Aluminum passivation refers to the process of metal oxidation by strong oxidizing agent or electrochemical method, so that the surface becomes inactive, that is, passivation process, is to transform the metal surface into a state that is not easy to be oxidized, and delay the corrosion rate of the metal.
The loss of electrons in a substance is called oxidation; On the contrary, the action of gaining electrons is called reduction. In the narrow sense, oxidation reaction refers to the combination of substances and oxidation. Reduction is the loss of oxygen in a substance. The oxidation number increases during oxidation. The oxidation number decreases during reduction. Oxidation and reduction both refer to reactants (molecules, ions or atoms). Oxidation is also called oxidation reaction. The action of introducing organic matter into oxygen or removing hydrogen is called oxidation. The effect of introducing hydrogen or losing oxygen is called reduction. Slow reaction of material and oxygen slowly heating without luminescence oxidation is called slow oxidation, such as metal rust, biological respiration and so on. The intense oxidation of light and heat is called combustion.