The pinyin of shovel: tiě qiāo.

Introduction of shovel:

The shovel is a kind of agricultural tool can be used for plowing and shoveling; its long handle is mostly made of wood, and the head is made of iron, and it can be used for military purposes. Commonly used shovels are categorized as pointed shovels, square head shovels.

Common shovel classification:

1, according to the material points.

Common shovels: generally according to the use of cheaper iron made, easier to bend.

Manganese steel shovel: generally made of 65 manganese steel 50 manganese steel manganese steel high carbon manganese steel, etc., the hardness is relatively very high.

Stainless steel spade: generally made of stainless steel, metal luster is relatively strong, high hardness. The price is also very expensive.

2, according to the spade type.

Tip shovel: also known as round head shovels, shovel head is generally made of arc type, due to the contact point with the soil is relatively less, tip shovels digging is relatively very labor-saving.

Square head shovel: also known as flat shovel, in many senses this shovel in many places, such as Hebei, Beijing, Zhejiang, Tianjin, Shandong, Jiangsu, Sichuan, Yunnan, Shanghai and other places also known as shovel. Hebei, Beijing, Zhejiang, Tianjin, Shandong, Jiangsu, Sichuan, Yunnan, Shanghai and other places also called this shovel for shovel.

Shovel rust removal methods and precautions:

One, rust removal methods.

1, physical methods.

Mainly the use of sanding to remove rust, such as sandpaper, grinding wheel, wire brush, steel wire ball and so on.

2, chemical methods.

The main use of acid and rust chemical reaction, so as to achieve the purpose of rust removal.

The common rust remover in life is mainly composed of hydrochloric acid, dilute sulfuric acid, they can react with iron oxide, which penetrates to the surface of steel products along the cracks of the rust layer and impurity layer, the rust layer and impurity layer to produce dissolution, stripping effect, so that the rust layer, impurities and oxidized skin from the surface of the steel products.

Two, precautions.

1, acid has a certain degree of corrosiveness, so you need to wear protective clothing when removing rust. In addition, the acid and iron will produce hydrogen, which will explode when it meets the open flame, so the fireworks need to be prohibited during the rust removal operation.

2, hydrochloric acid, dilute sulfuric acid can react with iron oxide, in the selection of the main consideration of four factors: the effect of descaling, acid production costs, acid transportation and storage, the use of safe and environmentally friendly.

3, citric acid instead of hydrochloric acid, dilute sulfuric acid can be a solution to the current drawbacks of the rust remover pollution of the environment, glycerin can strengthen the adhesion properties of rust remover on the metal surface. And this kind of rust remover has rust prevention function in addition to rust removal function.