Anticorrosive paint = anti-rust paint? Distinguish between the two!

Anti-rust paint is a coating
that protects metal surfaces from chemical or electrochemical corrosion such as the atmosphere, seawater, etc.
It is mainly divided into two categories
: physical and chemical anti-rust paint.
The former relies on the proper coordination of pigments and paints to form a dense paint film to prevent the invasion of corrosive substances, such as iron red, aluminum powder, graphite anti-rust paint, etc.
; The latter relies on the chemical rust inhibition effect of anti-rust pigments, such as red dan, zinc yellow anti-rust paint and other coatings online coatingol.
com
.
It is used for rust
prevention of bridges, ships, pipelines and other metals.

The anti-rust paint currently used is roughly oily
and water-based.
Oil-based anti-rust paint makes it difficult to remove greasy material surfaces and has been rarely used
.

Oil-based anti-rust paint

Easy to use, low price, but because of the content of nitrite, chromate and other toxic substances, the operator is more harmful, the state has restricted the use, and such products have a single performance, can not meet the rust prevention requirements of
magnetic alloy materials.

Water-based anti-rust paint

The metal strong chelating agent inositol hexaphosphate is selected as the main component, and it is compounded
with several other water-based additives.
Inositol hexaphosphate is a natural non-toxic organic chemical product extracted from food crops, when it is used as a magnetic material rust inhibitor, it can quickly chelate with the metal on the surface to form a dense single-molecule complex protective film, which can effectively inhibit the corrosion
of the metal.
The surface of the material treated by this product retains its original color, and it can enter the next process
such as painting without washing.

Anti-rust pigments are an important part of anti-rust paint

Physical anti-rust pigments are a kind of pigments with relatively stable chemical properties, they rely on their own physical properties, chemical properties are stable, hard texture, fine particles, excellent filling, improve the density of the paint film, reduce the permeability of the paint film and thus play a role in rust prevention.
Iron oxide red is one such substance.
The rust resistance of metal aluminum powder is due to the fact that aluminum powder has a scaly structure, forms a tight paint film, and has a strong ability to reflect ultraviolet light, which can improve the anti-aging ability of the paint film.

Anti-rust paint product features

●Suitable for rust
prevention of ferrous and non-ferrous metals.

●Suitable for outdoor cover and anti-rust
of metal under indoor conditions.

●Water-soluble, non-flammable, no pollution to the environment, safe
to use.

●Excellent anti-rust function, can completely replace anti-rust oil and grease
.

●It is easy to remove from
the metal surface by alkaline cleaning method.
Coating and painting
can be performed directly on surfaces treated with diluent above 1:20.

●Unique vapor phase action to protect uncoated or hard-to-reach surfaces
.

● It has good resistance to hard water
.

●Good thermal stability, still has a good anti-rust function
at high temperature.

●Suitable for all ferrous materials, spraying and impregnation
.
Free from nitrites and nitrates
.

●Formation of a hydrophobic film on the metal surface

Metal rust is the most common and most costly type of corrosion
.
Anti-rust work has always been one of the major scientific research topics at home and abroad, and people have developed a variety of measures to prevent and inhibit the corrosion of metals, and coating rust prevention is an effective method
.

If they are distinguished by their anti-rust mechanism, they can be roughly summarized into four types: physical anti-rust paint, chemical anti-rust paint, electrochemical anti-rust paint and comprehensive anti-rust paint
.

Anticorrosive paint is a type of paint
used on the surface of an object to protect the inside of the object from corrosion.
It is a kind of paint more commonly used than anticorrosive paint in industrial construction, which is widely used in aviation, shipbuilding, chemical industry, oil pipelines, steel structures, bridges, oil brick well platforms and other fields, and is favored
by the majority of construction manufacturers.

Types and ingredients of anticorrosive paints

There are many types of anticorrosive paints according to the composition can be generally divided into: epoxy anticorrosive paint, polyurethane anticorrosive paint, acrylic anticorrosive paint, inorganic anticorrosive paint ZS; Pervinyl chloride anticorrosive paint, chlorinated rubber anticorrosive paint, high chlorinated polyethylene anticorrosive paint
.

According to the use, it can be divided into: rubber anticorrosive paint, pipeline anticorrosive paint, furniture anticorrosive paint, marine anticorrosive paint, metal anticorrosive paint, automotive anticorrosive paint; According to the solvent, it can be divided into: water-based anticorrosive paint, oil-based anticorrosive paint;

Anticorrosive paint is a mixture of a variety of aqueous silicate minerals, the main chemical group is Al2O3 and SiO2 oxides
.

Al2O3 is mainly derived from clay minerals, and SiO2 comes from particulate quartz
in addition to clay minerals.
The closer the Al2O3 content and Al2O3/SiO2 ratio are to the theoretical value of kaolinite minerals, the higher
the purity of this clay.
The more kaolinite content in the clay, the better
its quality.
The higher the refractory of the clay, the wider
the sintering melting range of the clay.
The main impurities in clay are alkali metals, alkaline earth metals, oxides such as iron and titanium, and some organic substances
.
Various oxides act as a flux, which will reduce the refractory of the raw material, so the lower the content of impurities in the clay, especially Na2O and K2O, the higher
its refractory.
There are many types of minerals in clay, but they are usually composed of only 5~6 kinds of minerals, the main mineral is kaolinite
.
Common impurity minerals are quartz, mica, iron-containing minerals, feldspar, rutile and so on
.
The content and uniformity of impurities affect the fire resistance of
clay.
Anticorrosive paint will undergo a series of physical and chemical changes during the heating process, such as decomposition, chemical combination, recrystallization, etc.
, accompanied by volume shrinkage
.
These changes have an important impact on
the process and properties of clay products.
China's clay raw materials, whether hard clay, soft clay or semi-soft clay, are mainly
kaolinite-type.
Therefore, the heating change of clay is essentially the heating change of kaolinite and the physicochemical reaction
between kaolinite and impurity minerals.
Hard clay clinker is the main raw material of clay refractory materials, usually obtained by directly mining hard clay raw material block inverted flame kiln, or rotary kiln, or vertical kiln calcination
.

In addition to chemical composition, refractory production requires clay clinker with high bulk density, low porosity, low water absorption, and adequate sintering
.
Therefore, the calcination temperature and holding time have obvious effects on
the quality of clay clinker.
When the calcination temperature is 1200~1250 degrees Celsius, the clinker bulk density and porosity indicators are the best
.
At greater than 1350 degrees Celsius, the bulk density decreases and the porosity increases, because at this time the quartz stone is generated in large quantities, the volume expands, and the developed scorched gemstone layer leads to clinker block cracking, and the main mineral phase of the anticorrosive paint hard clay is mullite, accounting for 35%~55%, followed by the glass phase and cubic quartzite
.