Choose the appropriate rust removal method for the following steel products

Cooking utensils. Tableware is now generally used stainless steel, if you want to prevent rust, the iron pot is generally passivated, and the common tableware is electroplating (chrome plating) and enamel.

The mailbox can be seen all over the street, and the mailbox is painted with green paint, that is, the paint used to prevent rust.

Refrigerators and washing machines are also painted to prevent rust.

The surface of the canning box is also painted with a layer of paint, and the faucet (which may be paint or resin or something like that) is generally chrome-plated on the surface.

Steel window frames, the previous steel window frames are painted with iron red anti-rust paint.

Fitness equipment: Outdoor fitness equipment is also painted, steel gates in seawater: corrosion-resistant cast iron, or stainless steel, if it is an iron core, it should be chrome plated on the surface.

Farm Machinery Farm Tools: Farm tools are rarely rust-proof, and if they are new, they will be painted with a layer of paint.

Urban road guardrails: Most guardrails are galvanized, and some are painted to prevent rust.

Car exhaust pipe: The car exhaust pipe is also painted on the surface, and there is no anti-rust measure near the engine, if the exhaust pipe is exposed, it is generally chrome plating, and the appearance is similar to the exhaust pipe of a motorcycle.

Many metal parts in the home are prone to rust, try this method to remove rust stains.

Answer]: A The test point involved in this question is the method of removing rust from the surface of steel. To remove rust on the surface of steel, the projectile rust removal method, dry spray method, Qin Luyuan hand tool derusting method, power collapse tool derusting method, high-pressure water jet derusting method, flame derusting method, and chemical derusting method can be used.

Answer]: B textbook p88-91

The projectile rust removal method, also known as the shot blasting method, is a steel shot (particle size) thrown by using the high-speed rotating impeller in the shot blasting device (the particle size is, hitting the surface of the treated workpiece at a certain angle to remove the rust and other dirt on the metal surface. The degree of automation of projectile rust removal is high, and it is suitable for the production of Jianzhenghe assembly line, which is mainly used for metal surface treatment of workpieces in the coating workshop.

Answer] :d Analysis] The quality grade of steel surface rust removal is divided into: manual or power tool rust removal ST2 and ST3, two levels; Jet or projectile rust removal SA1, SA2, 4 stages.

The rust removal method that should be used for each grade is: ST2, complete rock trembling manual and power tools to remove rough and late rust; ST3, very thorough rust removal by hand and power tools; SA1, mild jet or projectile rust removal; SA2 thorough jet or projectile derusting; , very thorough jet or projectile rust removal; SA3, very completely remove all impurities on the metal surface, there is no visible residue and traces on the surface, showing a uniform metal color, and a certain roughness.

Answer]: B. Gao Hong, see textbook p94).

Analysis] This cave operation question examines rust removal, corrosion prevention and thermal insulation engineering. The tumbling method is suitable for the rust removal of small parts in batches.

Use hydrochloric acid and corrosion inhibitor to remove rust, do not hurt iron products, but also remove rust.

Concentrated nitric acid or concentrated sulfuric acid does not hurt iron products in addition to rust.

The toothpaste is so great to apply to the key, it solves everyone's troubles, it is so convenient.

1. Keep the surface of iron products clean and dry.

3. Add some metal or non-metal to iron products to make stainless steel.

General rule: Keep the surface clean when not in use, and there should be no water, salt, acid and alkali.

1) Hacksaw blade: oil when not in use (new engine oil is OK, not ** oil), long-term use can be wrapped in a clean plastic bag. But the hacksaw blade is very easy to break, just ask not to be so serious; (2) Bicycle frame:

Avoid rain, park indoors as much as possible, and dry it with a cloth when you come back from the rain. If the shovel is more serious, the nearby paint and shovel can be completely scraped off and repainted; (3) Bicycle handlebar: same as the frame; (4) Basin:

If you don't use the steel basin, you don't have to maintain it, just dry it when it's not in use, I don't know how to use the iron, and the basin must touch the water; (5) Stainless steel stair handrails: wipe regularly, but this kind of public things ordinary people will not care, please a cleaner (6) Iron water pipes: must use special stainless steel pipes, water pipes must be soaked in water, iron can never be used as water pipes.

Bake blue, painted, chrome-plated, enamelled, formed stainless steel, galvanized.