Nanjing Shangding Chemical Industrial Co.Ltd

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Tolyltriazole News

The Corrosion Mechanism and Protection Technology of 1,2,3-Benzotriazole

The corrosion mechanism of 1,2,3-Benzotriazole:
Reactive groups and the corrosion process 1,2,3-Benzotriazole molecule generated by the interaction of metal ions to form insoluble precipitates with the film or film on the metal surface to form a precipitate further polymerized protective film, thus preventing the corrosion process. Benzotriazole and Benzotriazole BTA derivatives on copper or copper alloy with unique and excellent corrosion properties. Its corrosion protection mechanism: in the benzene Benzotriazole solution, the solid-liquid interface of the copper substituted at a Benzotriazole NH functional groups of molecules of hydrogen atoms connected by covalent bond, and with another Benzotriazole nitrogen atoms in the molecule of free electrons to form a coordination bond connected to a semi-permeable polymeric complex.
This polymeric complex is stable at a film insoluble in many solvents and solution, has good corrosion protection. Benzotriazole protective role for anti-tarnish silver or silver plating is also based on the complex causes of polymeric film formation. Benzotriazole aluminum tin, zinc cadmium also has good corrosion inhibition, mainly due to cadmium and zinc ions precipitate thin film formed on the surface, which can effectively prevent the zinc and cadmium oxide formed on the surface and corrosion.
Copper or copper alloys (such as brass, bronze, beryllium copper, etc.) parts through conventional degreasing, pickling, and in cleaning processes, reach the surface clean and bright, can be immersed in Benzotriazole solution immediately, to be repeated jitter components, after dipping 3min out, wash with clean running water, compressed air, drying at 60 ℃ 15 ~ 30min. If the temperature is too high to reach 100 ℃, the surface is easy to red-brown and affect appearance. Note that the control temperature is not too high, this can make the copper or copper alloy parts to get more satisfactory corrosion protective effect.
For copper plating, copper alloy plating, imitation gold plating, etc., in order to prevent oxidation coating discoloration, corrosion and corrosion protection to improve their performance, usually after plating, carefully cleaned, and then using Benzotriazole solution passivation.