“Silica Anti-corrosion pigment” is an abbreviation, and the full name is “ion-exchange silica anti-corrosion pigment”, use modified with calcium oxide.
About appearance: it is a white powder, odorless, soluble in water, smooth to the touch, and light in density;
About the application: mainly used for coating systems that contact metal surfaces, to prevent and delay corrosion, and is mostly used for metal coils, construction machinery, etc.
Why silica anti-corrosion pigment is important?
On some special applications, many traditional anti-corrosion pigments cannot meet the requirements; there are two prominent points:
First, some applications are not allowed to contain zinc and other materials that are harmful to the human body and the environment;
Second, traditional anti-corrosion pigments cannot meet the requirements of long-term corrosion resistance under the condition of relatively high process requirements.
At present, under severe application conditions, only Silica anti-corrosion pigments can meet the application requirements, so if coatings producers need to develop high-end products, only silica anti-corrosion pigments are the choice.
How does silica anti-corrosion pigment work?
Unlike traditional anti-corrosion pigments, silica anti-corrosion pigments have very strong reactive ions, which protect the metal surface before the paint is fully cured; this is a function that traditional anti-corrosion pigments do not have, usually after the paint is cured, traditional anti-rust pigments will start to take effect, which is especially obvious in water-based paint systems;
In the scratches-breaking type experiment, the exposed metal surface in the air will quickly form a passivation rust layer due to the ion exchange reaction with the calcium ions in the Silica anti-corrosive pigments, preventing the further spread of corrosion; This is why in many salt spray tests, although the experimental samples of silica anti-corrosive pigments will produce a lot of rust water, the overall salt spray resistance test is very ideal. This process is very similar to the process of wound healing in human skin.
What kinds of applications should I use silica anti-corrosion pigments?
- Non-Zinc requirements or other environmental requirements
- More than 600 hours requirement for salt spray testing
- Special for waterborne coatings systems
Where I can purchase the silica anti-corrosion pigments?
Currently, only a few brands are able to provide this type of material, including GRACE, HHC, etc.;
However, the products provided by HHC have superior performance, and the product price is comparable to traditional anti-corrosion pigments, so the overall cost can be greatly reduced, so it is recommended to use HHC’s Silica anti-corrosion pigments as the first choice.
HHC can provide customers with professional technical services, free samples, and complete information. If you are interested, please send in the form below to contact the HHC professional team.
