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Car body coating method of novel nanometer pretreatment combining floating-coating-free water paint

A technology of car body and coating method, which is applied in the direction of pretreatment surface, device for coating liquid on the surface, coating, etc., which can solve the problems of difficult control of surface quality state, high comprehensive cost of coating, and long process flow, etc. Achieve the effects of increasing metal corrosion resistance and coating adhesion, reducing plant area and saving investment

Active Publication Date: 2016-03-09
DONGFENG PEUGEOT CITROEN AUTOMOBILE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The traditional coating method of car body is zinc, manganese, nickel ternary phosphating pretreatment and intermediate coating solvent-based topcoat coating method. It has mature technology, excellent performance and wide application, but there are waste organic solvents (VOC), Wastewater, waste residue and other pollutants discharge large amount, high energy consumption, long process flow, high overall cost of coating, etc. In recent years, new nanometer pretreatment technologies developed by foreign automobile manufacturers include zirconium salt pretreatment, silane pretreatment, etc., which can eliminate Heavy metal pollution before phosphating treatment reduces sewage production and energy consumption; a series of compact topcoat technologies have been developed, including water-based 3C1B and intermediate-coating-free water-based paint technologies, which have greatly reduced VOC emissions, compact process flow, Saving energy consumption, helping to reduce coating costs and other advantages
The new nano-pretreatment and compact topcoat technology are used together to maximize environmental protection and energy-saving benefits. However, based on the characteristics of these two new technologies, it is difficult to control the surface quality of each coating on the car body. Therefore, the new nano-pretreatment is adopted. Coating with the compact topcoat coating technology for car body coating has not been reported at home and abroad so far

Method used

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  • Car body coating method of novel nanometer pretreatment combining floating-coating-free water paint
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  • Car body coating method of novel nanometer pretreatment combining floating-coating-free water paint

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Effect test

Embodiment 1

[0034] Such as figure 1 As shown, the car body coating method of the present invention's novel nano-pretreatment and intermediate-coating-free water-based paint, the steps are as follows: novel nano-pretreatment → electrophoretic coating → electrophoretic drying → coating PVC sealant and anti-stone impact coating → PVC glue Pre-baking→spraying of primer-free water-based paint→pre-baking of water-based paint→spraying of varnish→drying of topcoat.

[0035] New nano-pretreatment process: Degreasing 1→Grease 2→Washing 1→Washing 2→Washing 3→Silane zirconium salt composite treatment→Washing 4→Washing 5→Washing 6,

[0036] Degreasing 1 is: spraying, the treatment time is 150s, the temperature is 55-59 ℃, using GardocleanS5176 and GardobondAdditiveH7419 degreasing agents and deionized water to prepare degreasing liquid 1, in which the free alkali is 6.0-15.0pt, and the pH value is 10-11.5;

[0037] Degreasing 2 is: full immersion, the treatment time is 250s, the temperature is 55-59 ...

Embodiment 2

[0065] Such as figure 1 As shown, the car body coating method of the present invention's novel nano-pretreatment and intermediate-coating-free water-based paint, the steps are as follows: novel nano-pretreatment → electrophoretic coating → electrophoretic drying → coating PVC sealant and anti-stone impact coating → PVC glue Pre-baking→spraying of primer-free water-based paint→pre-baking of water-based paint→spraying of varnish→drying of topcoat.

[0066] New nano-pretreatment process: Degreasing 1→Grease 2→Washing 1→Washing 2→Washing 3→Silane zirconium salt composite treatment→Washing 4→Washing 5→Washing 6,

[0067] Degreasing 1 is: spraying, the treatment time is 150s, the temperature is 55-59 ℃, using GardocleanS5176 and GardobondAdditiveH7419 degreasing agents and deionized water to prepare degreasing liquid 1, in which the free alkali is 6.0-15.0pt, and the pH value is 10-11.5;

[0068] Degreasing 2 is: full immersion, the treatment time is 250s, the temperature is 55-59 ...

Embodiment 3

[0096] Such as figure 1 As shown, the car body coating method of the present invention's novel nano-pretreatment and intermediate-coating-free water-based paint, the steps are as follows: novel nano-pretreatment → electrophoretic coating → electrophoretic drying → coating PVC sealant and anti-stone impact coating → PVC glue Pre-baking→spraying of primer-free water-based paint→pre-baking of water-based paint→spraying of varnish→drying of topcoat.

[0097] New nano-pretreatment process: Degreasing 1→Grease 2→Washing 1→Washing 2→Washing 3→Silane zirconium salt composite treatment→Washing 4→Washing 5→Washing 6,

[0098] Degreasing 1 is: spraying, the treatment time is 150s, the temperature is 55-59 ℃, using GardocleanS5176 and GardobondAdditiveH7419 degreasing agents and deionized water to prepare degreasing liquid 1, in which the free alkali is 6.0-15.0pt, and the pH value is 10-11.5;

[0099] Degreasing 2 is: full immersion, the treatment time is 250s, the temperature is 55-59 ...

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Abstract

The invention discloses a car body coating method of novel nanometer pretreatment combining floating-coating-free water paint. The method includes the following steps of novel nanometer pretreatment, electrophoretic coating, electrophoretic drying, PVC sealant and stone-chip-resistant paint coating, PVC sealant pre-drying, floating-coating-free water colored paint spraying, water colored paint pre-drying, varnish spraying and finish paint drying. Compared with a traditional coating method of phosphorization pretreatment combining solvent type floating-coating finish paint, the car body coating method has the beneficial effects that the area of a factory and a production line are saved, a building period is shortened, environmental protection benefits are great, and the social benefits of low pollutant emission, energy conservation and consumption reduction are remarkable.

Description

technical field [0001] The invention belongs to the technical field of car body surface decoration and protection, and in particular relates to a car body coating method matched with a novel nano-pretreatment and primer-free water-based paint. Background technique [0002] The traditional coating method of car body is zinc, manganese, nickel ternary phosphating pretreatment and intermediate coating solvent-based topcoat coating method. It has mature technology, excellent performance and wide application, but there are waste organic solvents (VOC), Wastewater, waste residue and other pollutants discharge large amount, high energy consumption, long process flow, high overall cost of coating, etc. In recent years, new nanometer pretreatment technologies developed by foreign automobile manufacturers include zirconium salt pretreatment, silane pretreatment, etc., which can eliminate Heavy metal pollution before phosphating treatment reduces sewage production and energy consumptio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B05D7/16B05D3/10B05D3/02B05D3/00C23C22/06
CPCB05D3/007B05D3/0254B05D3/102B05D7/16B05D7/586B05D2506/25C23C22/06C23C2222/20B05D2420/01
Inventor 李明桓彭彪斌许慎龚天喜吕睿
Owner DONGFENG PEUGEOT CITROEN AUTOMOBILE
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