A pre-treatment process of metal surface atomization and spraying

Abstract

The invention discloses a metal surface atomization spraying pretreatment process. The metal surface atomization spraying pretreatment process includes the following steps that (1), a to-be-treated metal workpiece is hang on an assembly line hook; driven by a transmission chain, the to-be-treated metal workpiece moves along a treatment box; and firstly, the to-be-treated metal workpiece enters into a treatment box degreasing section; and degreasing liquid spraying degreasing treatment is carried out; (2), the degreased metal workpiece enters into a treatment box water scrubbing section; and cleaning water spraying water scrubbing treatment is carried out; and (3), the metal workpiece after water scrubbing enters into a treatment box filming section; and treatment liquid atomization spraying filming treatment is carried out; The treatment liquid of atomization spraying is suspended in the treatment box filming section; when the metal workpiece passes by, the surface of the metal workpiece will absorb the treatment liquid, and then the filming procedure is completed accordingly; and then, the metal workpiece enters into a drying section; the metal workpiece after filming treatment isdried; and metal workpiece surface pretreatment is completed. According to the metal surface atomization spray pretreatment process, the filming treatment liquid can be effectively prevented from being polluted; waste of the treatment liquid can be reduced and the impact of a bunch of grooves can be eliminated; the filming quality and the filming uniformity of the treatment liquid can be improved; and the pretreatment film stability is maintained.

Description

technical field [0001] The invention relates to a metal surface atomization and spraying pretreatment process, which belongs to the field of metal surface pretreatment. Background technique [0002] In order to provide good protection for the metal substrate, prevent the metal substrate from being corroded before painting and improve the bonding force and anti-corrosion performance of the paint film and the substrate, the metal substrate must be pre-treated on the metal surface before painting. At present, the commonly used metal surface pretreatment processes include silanization treatment process, silicon-zirconium composite treatment process, and zirconization treatment process. The metal surface pretreatment process includes degreasing, water washing, coating and other processes. At present, the treatment methods of degreasing, water washing and coating processes are all immersion, spray, soaking and spraying combination or brushing. However, the above-mentioned treatme...

AI Technical Summary

Problems solved by technology

However, the above-mentioned treatment methods, especially in the coating process, have the following disadvantages: the spray coating treatment method, the repeated spraying of the treatment solution is easy to generate foam, and the content of metal ions in the treatment solution after repeated spraying of the metal substrate It will rise, resulting in discoloration and turbidity of the treatment liquid, which will affect the performance of the treatment liquid; if the degreasing and washing effect in the front is not good, the metal workpiece will also bring surfactants and impurity ions that are not easy to clean in the degreasing tank into the treatment In the liquid tank, it causes stringing, which seriously affects the quality and service life of the coating film of the treatment solution; and the treatment solution is repeatedly sprayed and used, and the concentration of the treatment solution will gradually change as time goes on, resulting in uneven quality of the coating film. Unstable pretreatment membrane performance

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