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What issues need to be considered when purchasing cold spray zinc coatings?

  • Categories:Coating Q&A
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  • Time of issue:2021-07-27
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(Summary description)As a new type of heavy-duty anti-corrosion primer, cold spray zinc anticorrosive paint has great advantages compared with traditional epoxy zinc-rich and inorganic zinc-rich primers: one component: convenient construction; high zinc powder content, good anti-corrosion effect , Environmental performance is also good. Therefore, it is very popular with anti-corrosion engineering users. Whether it is painting steel structure iron towers or hot-dip galvanizing repairs, they are all areas where they can show their skills.

What issues need to be considered when purchasing cold spray zinc coatings?

(Summary description)As a new type of heavy-duty anti-corrosion primer, cold spray zinc anticorrosive paint has great advantages compared with traditional epoxy zinc-rich and inorganic zinc-rich primers: one component: convenient construction; high zinc powder content, good anti-corrosion effect , Environmental performance is also good. Therefore, it is very popular with anti-corrosion engineering users. Whether it is painting steel structure iron towers or hot-dip galvanizing repairs, they are all areas where they can show their skills.

  • Categories:Coating Q&A
  • Author:
  • Origin:
  • Time of issue:2021-07-27
  • Views:0
Information

1. Features of cold spray zinc coating

As a new type of heavy-duty anti-corrosion primer, cold spray zinc anticorrosive paint has great advantages compared with traditional epoxy zinc-rich and inorganic zinc-rich primers: one component: convenient construction; high zinc powder content, good anti-corrosion effect , Environmental performance is also good. Therefore, it is very popular with anti-corrosion engineering users. Whether it is painting steel structure iron towers or hot-dip galvanizing repairs, they are all areas where they can show their skills.

The market for cold-sprayed zinc anticorrosive coatings is also chaotic. The quality of products varies from well-known international brands, fake international brands, domestic regular manufacturers, and domestic informal manufacturers. When customers choose cold spray zinc anticorrosive coatings, they should focus on the following aspects from the perspective of the quality of the coating itself: The construction performance of the coating: brushing, air spraying, and airless spraying are barrier-free. If it is roller coating, special Explain with the manufacturer.

The drying time meets the requirements: the cold spray zinc anticorrosive coating should be able to dry quickly, and the surface drying time is less than half an hour. Powerful manufacturers often have different product lines or can adjust the drying time according to user requirements.

The paint film hardness, toughness, impact resistance and other indicators meet the requirements. Although this is only a routine inspection item for paint, it is very important and affects the firmness and anti-destructive ability of the paint coating.

 

2. Indexes considered for cold galvanized paint

NO. Test items Testing base Test results
1 Paint film adhesion (cross-cut method) GB 9286-88 0级
2 Paint film abrasion resistance (500g, 1000 revolutions) GB 1768-89 ≤0.0451g
3 Density GB 6750-86 2.8±0.2g/mL
4 Rotational viscosity GB 9751-88 6.5±0.5Pa.s
5 Coating solid content GB 1725-79(89) 80.5±3.0%
6 Drying time Surface dry(25℃) GB 1728-79(89) ≤15分钟
Hard work(25℃) 2-3小时
7 Impact resistance GB 1732-93 50 CM
8 Salt spray resistance test ASTM B117-94 ≥3000Hour
9 Dry film zinc powder content ASTM D6580 ≥96%
10 Volume resistance GB/T1410-2006 4.2×105Ω.cm
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