Product Specifications
| Markets: |
North America,South America,Eastern Europe,Southeast Asia,Africa,Oceania,Mid East,Eastern Asia,Western Europe |
| Name: |
Chrome Effect Powder Coating |
| Method: |
Spray |
| Appearance: |
Powder |
| Main Raw Material: |
Polyester Resin |
Product Description
Powder coating is by far the youngest of the surface finishing techniques in common use today. It was first used in Australia about 1967. Powder coating is the technique of applying dry paint to a part. The final cured coating is the same as a 2-pack wet paint. In normal wet painting such as house paints, the solids are in suspension in a liquid carrier, which must evaporate before the solid paint coating is produced.
In powder coating, the powdered paint may be applied by either of two techniques.
· The item is lowered into a fluidized bed of the powder, which may or may not be electrostatically charged, or
· The powdered paint is electrostatically charged and sprayed onto the part.
The part is then placed in an oven and the powder particles melt and coalesce to form a continuous film.
There are two main types of powder available to the surface finisher:
· Thermoplastic powders that will remelt when heated, and
· Thermosetting powders that will not remelt upon reheating. During the curing process (in the oven) a chemical cross-linking reaction is triggered at the curing temperature and it is this chemical reaction which gives the powder coating many of its desirable properties.
Preparation of powder coating
The basis of any good coating is preparation. The vast majority of powder coating failures can be traced to a lack of a suitable preparation.
The preparation treatment is different for different materials.
In general, for all applications the preparation treatment for aluminium is as follows:
CleanOrClean
Rinse Rinse
Etch Etch
Rinse Rinse
Chromate Phosphate
Rinse Rinse
Demineralized Rinse Demineralized Rinse
Oils and greases are removed in weak alkali or neutral detergent solutions and the surface is etched to remove heavy oxides. After rinsing, the aluminium is dipped into a chromate or phosphate solution to form a conversion coating on the aluminium. This film is chemically attached to the aluminium. After rinsing the aluminium is finally rinsed in demineralized water. Some non-chrome, dried in place pretreatment is beginning to come onto the market; Currently, these are not recommended for exterior applications.
The conversion coating has two functions:
It presents a surface to the powder which favors adhesion more than the oxides that form very readily on aluminium surfaces, and
It reduces the incidence of under film corrosion, which may occur at holidays in the coating.
The use of demineralized water reduces the presence of chemical salts on the aluminium surface. These salts have been found to cause filiform corrosion in humid conditions.
For steel the preparation for interior applications may be:
Clean
Rinse
Derust
Rinse
Iron Phosphate
Rinse
Acidulated Rinse
For exterior applications:
Clean
Rinse
Etch
Rinse
Grain Refine
Zinc Phosphate
Rinse
Acidulated Rinse
The grain refiner is used after acid cleaning of steel surfaces and before zinc phosphating, otherwise the zinc phosphate coatings produced will be very coarse with low adhesion. The powder coating applied to a coarse phosphate will produce rough coatings (a little like "sandpaper") and possess low adhesion.
For hot dipped galvanized coatings, which have been stored for more than about 4 hours before powder coating, the following process is necessary for exterior applications.
Clean
Rinse
Etch
Rinse
Grain Refiner
Rinse
Zinc Phosphate
Acidulated Rinse
The etch is required to remove the zinc corrosion products which begin to form almost immediately the zinc is removed from the galvanizing kettle. The grain refiner ensures a fine phosphate is produced.
How is it done -- electrostatic spray?
FuJian WanAn Industry Co., Ltd is a high-tech private enterprise which specializing in manufacturing thermosetting powder coating. Founded in January of 1996 and after more than ten years developing, we already became one of the top companies which focusing on research, developing, manufacturing and sales. Our products had gained a great reputations from both home and abroad because of it's stable quality, strong impact resistance, strong adhesion, perfect weather resistance property and large painting area.
As a high-tech enterprise, we always focus on brand construction and quality control. Basics on current ERP automatic information management, we import the world leading lab testing equipment and advanced automatic production line. We make production line become automatization and standardization under the ISO9001 international quality management system. As a famous brand of powder coating in China, WanAn brand has obtained "Famous brand of FuJian Province", "Brand-name products of FuJian province" and passed the U. S Food and Drug Administration. As a member unit of "Society of coating & finishing CIESC", we actively participate in drafting the industry standard. We gained "The carry contract and re-credit business" from State Administration of Industry and Commerce. We always take "Quality, services, innovation, efficiency" as market philosophy, face the market with our first class equipment, advanced testing devices, fast delivery services and best after-sale services, and serve all customers with serve ideal of "people oriented, people foremost", "safety and fast" and "Client oriented" "
