Formulation of painting mass standards for painting mass evaluation

Evaluation of coating quality

Coating quality gives people an intuitive impression of external quality, and it is the "first quality" factor for products entering the market in the form of commodities. Together with the internal quality of products, it determines the life of a product and even the survival of an enterprise. And development. Especially when our country joins the WTO and the national economy integrates into the world economy to participate in the fierce international market competition, it is urgently required that enterprises develop to modern enterprise management models, and production management to develop in a standardized and scientific direction. The coating production of products needs to be established. Corresponding coating quality evaluation system.

As an evaluation system for plant production quantity, it must include the following aspects:

①Advanced coating quality standard;

②Professional testing methods and testing rules;

③ Perfect and reasonable coating production operation rules and regulations;

④Quality monitoring management team and measurement and control system.

The last aspect belongs more to the content of enterprise management, but it also includes the testing technology of raw material inspection and acceptance; the third aspect has a direct relationship with the coating process; therefore, this chapter focuses on the formulation of quality standards and coating In-process paint and coating testing techniques.

Section 1 Coating quality standard formulation

Any enterprise should formulate professional and operable enterprise production standards according to the characteristics of its own products and production methods. The so-called professionalism is to have a wide range of versatility and interchangeability. To participate in international trade, it is necessary to adopt international standards for production. Only high-standard products can obtain market access certificates. Operability means that the formulated standard can be accepted by users, and it can also ensure that the products produced according to this standard have appropriate profit margins. Therefore, in the process of formulating, it can be formulated according to the differences in product application levels. different levels of standards. This requires the collection of the following technical information:

① The user's coating quality requirements for the company's products,

②National standards or industry standards and regulations;

③International standards and foreign professional standards;

④The coating equipment of the enterprise;

⑤Basic rules for writing standards

The content of the coating quality standard formulated should include the following aspects:

(]) Quality requirements for pre-paint treatment, such as clarity, surface roughness, chemical conversion coating quality, etc.;

(2) Coating quality requirements, including appearance quality, gloss, color, thickness, adhesion, hardness, etc.;

(3) Requirements for the selection of coatings, such as coating types and matching properties, construction properties and construction conditions (such as coating methods, coating temperature, humidity, coating intervals and drying conditions);

(4) Inspection methods and inspection rules. Inspection rules refer to random inspection or full inspection of a certain performance; inspection range and inspection frequency; regulations on judging whether the basic item performance is qualified or unqualified, etc.

The various standards available for reference are as follows:

GB3923-88 Corrosion grade and derusting grade of steel surface before painting

GB/T13312--9l test method for degreasing degree of steel parts before painting

GB 6807—Technical conditions for phosphating treatment of iron and steel workpieces before painting

GB 11376-89 Metal Phosphate Conversion Coating

GB11380-89 Specifications for Coating Bodywork of Passenger Cars

JB/2l11-86 car paint coating

GB/T 13492-92 various colors of automotive topcoats

GB/T 13492-92 Automotive Topcoats

JB/T5946-91 General Technical Conditions for Coating of Construction Machinery

GB 6745-86 General Specifications for Ship Hull Method

GB 6745--86 General Specifications for Marine Antirust Paint

ZB J 50011--89 Technical Conditions for Machine Tool Painting

ZB J 50011 -89 Specifications for Export Machine Tool Painting

HG/T2243-91 machine tool topcoat

HG/T2244-01 machine tool primer

GB/T1218-91 Bicycle painting technical conditions

HG/T2005-91 Refrigerator with enamel

HG/T2006-91 powder coating for refrigerator