Anti-rust Skills and Methods of Die Tool Steel

The die tool steel has been placed for a long time, and the surface of the die tool steel will be more or less rusty, so in the mold production, it will not only increase the labor cost, but also affect the quality of the product. It is very troublesome to deal with these problems, so many people want to ask, how to prevent rust for die tool steel, and what skills and methods are there for rust prevention?

1. Anti-rust skills of die tool steel

If the mold is rusted before it is put into production, first we use an angle grinder to grind it with a wire brush. Oxidized and rusted again.

Use a laser descaling machine to remove rust. Laser descaling machine is the best tool at present, and it is also the cleanest and the cleanest. However, the purchase price is relatively expensive, and it is generally used in professional industries. Apply anti-rust oil after rust removal.

Another is to use a rust remover, use a rust remover to remove the rust, and then use a cleaning agent to clean the surface of the rust remover, and then apply the rust remover. The rust remover used on the market is formulated with dilute sulfuric acid and hydrochloric acid, but the disadvantage of this rust remover is that the surface of the mold will be oxidized and rusted after one or two hours of rust removal. This is because part of the sulfuric acid and hydrochloric acid left on the surface of the mold after rust removal by the rust remover will chemically 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.

2. The method of die tool steel rust prevention

Weather-resistant steel: Steel with better corrosion resistance than general structural steel is called weather-resistant steel. It generally contains metals such as phosphorus, copper, nickel, chromium, and titanium to form a protective layer on the metal surface to improve corrosion resistance.

Hot-dip galvanizing: hot-dip galvanizing is to immerse the rust-removed steel components in a zinc solution melted at a high temperature of about 600 ° C, so that the surface of the steel components is attached with a zinc layer. Less than 86㎛. So as to achieve the purpose of anti-corrosion.

Hot-sprayed aluminum (zinc) composite coating: This is a long-term anti-corrosion method equivalent to hot-dip galvanized anti-corrosion effect. The specific method is to first sandblast and derust the surface of the steel component to expose the metallic luster and roughen the surface. Then use the acetylene-oxygen flame to melt the continuously sent aluminum (zinc) wire, and use compressed air to absorb it on the surface of the steel member to form a honeycomb aluminum (zinc) spray coating (thickness about 80㎛~100㎛). Finally, fill the capillary pores with epoxy resin or neoprene paint to form a composite coating.

Coating method: The corrosion resistance of the coating method is generally not as good as that of the long-term anti-corrosion method, and a layer of anti-rust oil can be applied.

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

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