浙江鑫利来涂装设备有限公司

Technical standards for surface coating and testing of steel products:
This standard is mainly applicable to the surface coating of steel products. Where the contract documents no extraordinary requirements, the product surface coating should meet the requirements of this standard.
First, the coating before the surface treatment
All for the manufacture of steel raw materials, paint before the need for surface rust treatment. And specify the time range within the coated primer (workshop primer).
1, before the spray rust, thick rust layer should be eradicated. And remove grease dirt. After the spray or rust, the surface of the steel must remove the debris.
2, for the provisions of the surface of the two kinds of rust stripping rust category. The text is described as follows:
Sa2 thoroughly spray rust: steel surface no visible grease dirt, and oxide, rust paint coating and other attachments have been basically removed, the residue should be firmly attached.
Sa2 very thoroughly spray rust. Steel surface no visible grease, dirt, iron oxide paint layer and other attachments, any residual traces should be only point or stripes slightly stains.
3, for the manual power tool rust steel surface, provides a rust level, the text described as follows:
St3 very handmade power tool derusting. Steel surface is not visible grease dirt, and there is no adhesion is not strong oxide, rust paint coating attached material. The surface of the substrate after rust removal should have a metallic luster.
4, "attachment" the term can include welding slag, welding spatter, soluble salts and so on. When the scale, rust or paint layer can be scraped from the steel surface scraping metal scraping, it should be seen as attached
5, to be checked with the corresponding surface of the steel visual comparison. Photos should be close to the steel surface. The assessment should be carried out under good sunlight or illuminated under considerable artificial lighting conditions.
6, pretreatment film thickness and paint options are as follows:
a) film (dry film) thickness: 15 ~ 25μm.
b) Coating varieties: inorganic zinc silicate (workshop) primer, epoxy primer, epoxy zinc-rich primer, zinc phosphate primer, iron red epoxy primer and so on.
c) the primer must be used to match the varieties of lacquer products or paint with the matching paint base paint.
Second, the technical requirements
1, before painting, must meet the requirements of the rust level standards, before the promise to paint.
2, mild corrosive environment, ready to brush conventional coating, the surface rust level for the Sa2 level.
3, by the chemical atmospheric corrosion, sea water erosion, high temperature oxidation and inorganic zinc-rich paint for the primer, the surface rust level for the Sa2 level.
4, before painting the surface roughness of steel must be controlled, in addition to control the angle of jet abrasive, the use of abrasive recycled pellets diameter of not more than 1.2mm.
5, spray or throwing rust to be painted surface, after cleaning should be immediately coated with the first layer of primer, the interval should not exceed 6h. Such as the surface and rust, should be re-processed, to meet the provisions of the standard before agreeing to paint.

Technical standard for surface coating and testing of steel products