How much do you know about water-based anti-rust coatings for rust coating?

Steel Corrosion, Happens Everyday, Everywhere

China's annual steel production exceeds 800 million tons, which are used in various industries and manufactured into various products

Although the vast majority of steel products are covered with coatings, corrosion still occurs slowly or rapidly

Do severely corroded products and facilities need to be scrapped? Or repaint and continue to use?

traditional paint brushing

If traditional paint is used on rusted steel surfaces

1.

Answer: poor

2.

Answer: Yes

Rust removal

1.
Chemical rust removal: use special organic solvents (strong corrosive) and special tools to dissolve and remove paint online coatingol.
com
.
These solvents are all hazardous chemicals and are extremely corrosive and therefore pose a high safety risk
.

2.
Sand blasting and rust removal: use special equipment for grinding and rust removal, water spray removal, and repeat until it is completely removed.
This method will generate a large amount of waste water and waste residue, and it is only suitable for regular surfaces
.

3.
The above two methods are basically not applicable to most of the facilities and equipment that have been put into use
.

Whether the rust can be completely transformed

Can the currently popular "rust transforming agent" completely transform rust?

1.
What is the main component of rust?

2.
From the perspective of chemical reaction, what kind of substance can react with rust and transform into another substance?

3.
The thickness of the rust layer is uneven.
Can the rust transforming agent react and transform all the rust in a short time?

4.
Can the newly generated substances after the reaction and transformation exist stably? Does it have good adhesion with the coating film above?

react or prevent

Is it to react all the rust that has been produced, or to prevent it from continuing to expand and grow?

1.
It is very difficult to completely react the rust.
Even if it reacts, it needs to be cleaned up.
In that case, what is the difference between sandblasting and rust removal?

2.
Therefore, the convenient way is to convert the rusted surface and solidify the entire rusted layer, otherwise it will affect the adhesion of the upper coating
.

3.
Conditions/elements required for the expansion and growth of rust: water and oxygen; if water and oxygen are basically blocked, will the rust continue to expand?

4.
If the surface-treated and cured rust layer is covered by an ultra-low water absorption coating, it will basically stop expanding and growing
.

Rusty Coating Solutions

"Water-based paint" rust coating solution - for heavily rusted substrates

1.
Brushing water-based special anti-rust liquid: environmentally friendly formula, its function is to penetrate and cure the entire rust layer, and at the same time convert the active substances on the surface into inactive substances
.

2.
The heavy-duty water-based primer adopts the self-developed ultra-low water absorption hybrid resin and chemical cross-linking technology, which enables the coating film to have ultra-low water absorption and the ability to seal and block the rust layer; this product has passed HG/ Type II standard test of T5173-2017 "Water-based primer for rust coating", the salt spray resistance of the paint film exceeds 300 hours
.

Waterborne paint with rust coating solution – for mild rust (rust area less than 50%)

After cleaning the rubbish and dust on the surface, apply the "Water-based Primer for Rusty Coating" directly.
The product is medium gray and has passed the Type I standard test of HG/T5173-2017 "Water-based Primer for Rusty Coating".
, The salt spray resistance performance exceeds 100 hours; it has super adhesion to the rusted substrate, anti-flash rust performance, and the extremely low water absorption rate of the coating film makes the coating film have a lasting sealing and barrier effect on the rust layer
.

topcoat

1.
The rust-coating water-based primer is an anti-rust primer for rusted substrates.
It belongs to a specific functional product and has no decorative properties.
At the same time, the anti-rust coating is an integral coating, and only the anti-rust primer is a Not enough; the total thickness of the heavy-duty anti-corrosion coating is not less than 150 microns
.

2.
Selection of topcoat: According to the corrosion degree of the environment and the anti-corrosion life requirements of the equipment, water-based acrylic anti-rust coatings, two-component acrylic polyurethane coatings, and water-based two-component fluorocarbon paints can be selected
.

3.
The general anti-corrosion coating system is one bottom and two sides, and the heavy-duty anti-corrosion coating generally requires 4-6 times (primer + middle coating + top coat)
.

4.
The blue topcoat in the case in the picture is a water-based pure acrylic paint
.