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Method for detecting cleanliness of cathode electrophoretic coating production equipment

A cathodic electrophoretic coating, cleaning technology, applied in the direction of electrolytic coating, electrophoretic plating, coating, etc., can solve the problems of pollution and waste, and achieve the effects of sensitive detection, reliable detection results and strong adsorption capacity

Active Publication Date: 2012-08-01
NIPPON PAINT GUANGZHOU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the existing detection methods (mainly the tank shrinkage cavity method), which need to prepare tank solution for each cleaning water sample, as well as the long detection time and the pollution and waste caused by discarding the tank solution, the purpose of the present invention is to provide a A method for detecting whether the cathodic electrophoretic coating production equipment is cleaned, that is, the dipping method. The dipping method does not need to prepare bath solution for each cleaning water sample, rapid detection, and the detection result is more reliable than the existing detection method

Method used

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  • Method for detecting cleanliness of cathode electrophoretic coating production equipment
  • Method for detecting cleanliness of cathode electrophoretic coating production equipment
  • Method for detecting cleanliness of cathode electrophoretic coating production equipment

Examples

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Embodiment 1

[0032] A method for detecting whether the cathodic electrophoretic coating production equipment is cleaned (dipping method), comprising the following steps:

[0033] (1) Cleaning equipment: clean the newly installed reactor (R-401), material pipelines (including valves), and clean the water samples for step (5) after standing for 20 minutes;

[0034] (2) Prepare bath solution: get the bath solution after mixing and stirring the ingredients in the following parts by weight:

[0035] Pure water: 40 parts

[0036] PN 150 F-2 (available from Guangzhou Nippon Paint Co., Ltd.): 40 copies

[0037] PN 150 F-1 (available from Guangzhou Nippon Paint Co., Ltd.): 20 copies;

[0038] The pure water refers to water with conductivity ≤ 2μs / cm;

[0039] (3) Bath aging: heat the bath at 40°C for 16 hours, and then replenish its volatile part with pure water;

[0040] (4) Electrophoresis: The pre-treated phosphating steel plate (specification: 150mm×70mm) was electrophoresed in the electrop...

Embodiment 2

[0048] A method for detecting whether the cathodic electrophoretic coating production equipment is cleaned (dipping method), comprising the following steps:

[0049] (1) Cleaning equipment: clean the electrophoresis product 210L inner-coated small-mouth packaging barrel, and use the cleaning water sample for step (5) after standing for 20 minutes;

[0050] (2) Prepare bath solution: get the bath solution after mixing and stirring the ingredients in the following mass percentages:

[0051] Pure water: 50 parts

[0052] PN 310 F-2 (available from Guangzhou Nippon Paint Co., Ltd.): 30 copies

[0053] PN 310 F-1 (available from Guangzhou Nippon Paint Co., Ltd.): 15 copies;

[0054] The pure water refers to water with conductivity ≤ 2μs / cm;

[0055] (3) Bath aging: heat the bath at 40°C for 16 hours, and then replenish its volatile part with pure water;

[0056] (4) Electrophoresis: The pre-treated phosphating steel plate (specification: 150mm×70mm) was electrophoresed in the e...

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Abstract

The invention discloses a method for detecting cleanliness of cathode electrophoretic coating production equipment. The method comprises the following steps of: preparing a bath solution, ageing the bath solution, performing electrophoresis, soaking, baking and evaluating the appearance of a phosphated steel plate. According to the detecting method (plate dipping method), the bath solution is not required to be prepared for each cleaning water sample, quick detection is realized, and the workload and the detection time are reduced; and because a paint film has strong oil stain adsorption capability, the method is sensitive to oil stain detection in the water samples, and the detection result is reliable.

Description

technical field [0001] The invention belongs to the field of cathodic electrophoretic paint production, and in particular relates to a method for detecting whether cathodic electrophoretic paint production equipment is cleaned—a dipping board method. Background technique [0002] Before cathodic electrophoretic coating is produced, production and packaging equipment need to be cleaned. If the cleaning is not clean and there are impurities such as oil stains, the impurities will be brought into the coating during production. When the customer applies the coating to the surface of the part, shrinkage cavities will be formed, which will affect the construction of the next process. [0003] The existing method for detecting whether the equipment is cleaned is the tank shrinkage cavity method, that is, the water sample of the cleaning equipment is mixed with the electrophoretic coating, and the volatile part is replenished with pure water after aging at 30-50 °C for 16-24 hours. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D13/00G01N21/88
Inventor 唐晓冬
Owner NIPPON PAINT GUANGZHOU
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