The appearance of the coating processed by thermal spraying can be distinguished:
1. Grab a handful of powder in your hand, the smoother the powder will be, and the quality will be better. On the contrary, the powder will feel rough and feel heavy and poor quality. It is not easy to spray, and the secondary powder falls too much and the waste is great.
2. The larger the volume, the less the filler in the powder spray coating, the higher the cost, and the better the quality; the smaller the volume, the higher the filler in the powder spray coating, and the lower the cost. The worse the quality.
3. The powder that is good for storage can be stored for a long time, and the powder leveling and other functions remain unchanged. Poor powder cannot be stored for a long time. Poor powder has poor leveling and other effects after 3 months. https://sandcasting.org/Normal powder has a shelf life of 12 months at room temperature. Using poor raw materials to produce powder, the sprayed surface will accelerate the powdering and aging after half a year.
Second, the spraying area of the coating processed by thermal spraying can be distinguished:
The resin content of the normal powder in the spray area should be about 55-65%, and the resin is about 20 yuan/KG.
Comparison method: spray the same product with two powders of the same kind, depending on the area of the powder sprayed product, the less sprayed area is worse, and the application cost is high. As far as the application manufacturer is concerned, the spraying area is small, and the application cost is high. It is recommended to use the manufacturer’s genuine powder.
Three, after the thermal spray laser cutting paint spraying personnel work to distinguish:
Powder loading rate, good power powder is easy to spray, spray 1-3 guns can cover the substrate, the secondary recovery of less powder, high power. Poor powder is not easy to powder, spray 3-5 guns to cover the substrate, the second time to recover more powder, low power. The operator is able to pass the spraying powder rate, and the amount of powder falling is not considered to be too much. At the same time, the output product is less, the secondary recovery powder is more, the burden of the operator is added, and the power is low.
Four, after the baking of thermal spray processing paint to distinguish:
Good powder does not produce a lot of smoke during the baking process. Poor powder has a lot of smoke during the baking process.
5. The appearance and gloss of the product after the thermal spraying process coating is baked:
A good powder product looks fine, plump, transparent, and has a strong three-dimensional effect, and can maintain a relative gloss for a long time. Poor powder products have dark appearance, sluggishness, foggy appearance, imperviousness, and poor three-dimensionality.https://cncmachining.jp
Sixth, after thermal spraying processing coating adhesion and aging to distinguish:
Good powder has strong adhesion, strong resistance, and can persist for several years without pulverization and aging. Poor powder coating starts to have poor adhesion and aging in a short period of time, and the product is prone to aging, chalking, rust, etc.
Seven, distinguished by the high temperature layer degree of the coating processed by thermal spraying:
Adjust the temperature to between 220-230 degrees and keep it for 10-15 minutes. A good powder has better temperature and weather resistance. After high-temperature baking, the color changes less and the gloss changes little. Poor powder, poor temperature and weather resistance, severe discoloration and dull gloss after high-temperature baking.