Why is the cast iron rusty?

Iron rust because the main component of iron and air oxygen and water chemical reaction, iron in a humid environment will react with oxygen and water to produce iron oxide, that is, our common rust, this process is called oxidation reaction, is the chemical nature of iron rust, although the cast iron contains carbon and other elements, but iron is the main component. Therefore, cast iron will rust as easily as pure iron.

Problems and solutions!

Cast iron as a common metal material used in industrial and living fields, but in the use of cast iron is also prone to rust phenomenon, which not only affects the appearance of the cast iron surface, but also affects its service life, how to cast iron pipe rust treatment! Today, let's take a look at an efficient and environmentally friendly rust removal solution.

Lightly rusted cast iron:

Can use Kirui new materials of environmental protection rust remover solution, through the organic raw materials in the product can effectively remove the rust on the cast iron, the operation can be directly soaked cast iron, spray, brush to loosen the rust, dry can be done after rust treatment (such as spray painting, electroplating and other processes), do not splash water before dry.

Heavily rusted cast iron:

According to the severity of iron rust, match the corresponding rust removal solution, heavy generally use strong rust removal agent formula, through pickling to carry out strong rust removal, the industrial grade efficient concentrated solution developed by Kirui new materials, the product small molecule rapid penetration and rust chemical reaction, easy to help customers quickly and easily solve the problem of iron rust.

Spray and brush method:

This method is often used for outdoor rust removal and anti-corrosion treatment, and rubber gloves and masks should be worn during construction.

1. If the surface of the cast iron has too serious floating rust, grease, marl, etc., it is best to clean it first.

2. Spray or paint the rust remover evenly on the cast iron surface, usually spray and brush twice for better effect (the first time after drying and then spray the second time) for serious corrosion parts can be applied several times.

3. Let the treated cast iron dry naturally. If it needs to be stored for a long time after drying, anti-rust agent can be used for anti-rust treatment. Do not touch the surface with your hand during the drying process, nor allow the surface to be stained with water.

4. Drying time: The required time varies greatly with different climatic conditions. Generally, spraying and brushing in sunny days at room temperature can be dried after 2-4 hours, and the drying time should be appropriately extended at low temperature.

Impregnation method:

The impregnation method is generally carried out in an open field or workshop. Acid resistant tanks must be used to store the rust remover solution. Rubber gloves and masks should be worn during construction.

1. If the surface of the cast iron has too serious floating rust, grease, marl, etc., it is best to clean it first.

2. The cast iron is immersed in the tank, the tank can play a role at normal temperature conditions, usually (15℃-35℃) need to soak for 3-10 minutes, in addition to heavy rust or oxidation, the soaking time should be properly extended.

3. Let the treated cast iron dry naturally. If it needs to be stored for a long time after drying, anti-rust agent can be used for anti-rust treatment. Do not touch the surface with your hand during the drying process, nor allow the surface to be stained with water.

4. Drying time: The required time varies greatly with different climatic conditions. Generally on a sunny day with a temperature of 25 ° C, the drying time after soaking is 4-8 hours, and the practical work is 24 hours.