If there is rust in the mold before it is put into production, first we use the angle grinder to install the steel wire brush wheel to polish. This method is the most common and simplest. After polishing, clean it, and then apply anti rust oil to prevent re oxidation and rust.

使用激光除锈机除锈，激光除锈机是目前的工具，也除锈干净，但购置比较昂贵，一般用在的行业里使用。除锈后再涂抺上防锈油。

Laser derusting machine is used for derusting. At present, laser derusting machine is the best tool and the cleanest for derusting, but the purchase price is relatively expensive. It is generally used in professional industries. Apply antirust oil after rust removal.

还有一种是使用除锈剂，使用除锈剂除掉锈迹之后再使用清洗剂把表面的除锈剂清洗掉，再涂抺上防锈剂。

Another is to use rust remover. After removing the rust with rust remover, use cleaning agent to clean the rust remover on the surface, and then apply rust inhibitor.

市场上用的除锈剂是用稀硫酸和盐酸配制而成，但这种除锈剂的缺点就是除锈一二小时之后模具表面又会氧化生锈。这是因为除锈剂除锈后模具表面会残留部分硫酸和盐酸跟模具产生化学反应，形成新的锈迹。建议大家不要使用这种含有硫酸和盐酸的除锈剂。

The rust remover used in the market is prepared with dilute sulfuric acid and hydrochloric acid, but the disadvantage of this rust remover is that the mold surface will oxidize and rust after rust removal for one or two hours. This is because after rust removal with rust remover, some sulfuric acid and hydrochloric acid will remain on the surface of the mold to react with the mold to form new rust. It is recommended that you do not use this rust remover containing sulfuric acid and hydrochloric acid.

耐候钢：耐腐蚀性能优于一般结构用钢的钢材称为耐候钢，一般含有磷、铜、镍、铬、钛等金属，使金属表面形成保护层，以提高耐腐蚀性。

Weathering steel: the steel whose corrosion resistance is better than that of general structural steel is called weathering steel. It generally contains phosphorus, copper, nickel, chromium, titanium and other metals to form a protective layer on the metal surface to improve the corrosion resistance.

热浸锌：热浸锌是将除锈后的钢构件浸入600℃左右高温融化的锌液中，使钢构件表面附着锌层，锌层厚度对5mm以下薄板不得小于65μm，对厚板不小于86μm。从而起到防腐蚀的目的。

Hot dip galvanizing: hot dip galvanizing is to immerse the steel member after rust removal into the molten zinc at a high temperature of about 600 ℃, so that the surface of the steel member is attached with a zinc layer. The thickness of the zinc layer shall not be less than 65 mm for thin plates less than 5mm μ m. No less than 86 for thick plate μ m。 So as to achieve the purpose of anti-corrosion.

模具钢

Die steel

热喷铝（锌）复合涂层：这是一种与热浸锌防腐蚀效果相当的长效防腐蚀方法。具体做法是先对钢构件表面作喷砂除锈，使其表面露出金属光泽并打毛。再用乙炔-氧焰将不断送出的铝（锌）丝融化，并用压缩空气吹附到钢构件表面，以形成蜂窝状的铝（锌）喷涂层（厚度约80μm~100μm）。用环氧树脂或氯丁橡胶漆等涂料填充毛细孔，以形成复合涂层。

Thermal spraying aluminum (zinc) composite coating: This is a long-term anti-corrosion method equivalent to the anti-corrosion effect of hot-dip galvanizing. The specific method is to remove the rust on the surface of the steel member by sand blasting to expose the metallic luster and roughen the surface. Then use acetylene oxygen flame to melt the continuously sent aluminum (zinc) wire and blow it to the surface of steel members with compressed air to form a honeycomb aluminum (zinc) spraying layer (thickness about 80 μ m~100 μ m）。 Finally, the pores are filled with epoxy resin or neoprene paint to form a composite coating.

涂层法：涂层法防腐蚀性一般不如长效防腐蚀方法，可以涂上一层防锈油。

Coating method: the corrosion resistance of coating method is generally not as good as that of long-term corrosion prevention method, and a layer of antirust oil can be coated.

阴极保护法：在钢结构表面附加较活泼的金属取代钢材的腐蚀。常用于水下或地下结构

Cathodic protection method: add more active metal on the surface of steel structure to replace the corrosion of steel. Commonly used in underwater or underground structures

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