Why do iron pieces with water turn blue when they are roasted over a fire?

Although the name is roasted blue.

In fact, chemicals such as sodium nitrate are used.

It oxidizes the metal surface into oxides at high temperatures to form a protective layer that is more resistant to corrosion. Depending on the metal material (carbon steel, stainless steel, aluminum alloy), different chemicals, and different construction procedures (temperature control, pre-sandblasting, etc.), different colors will be produced, and the most common is a deep blue-black color that is very close to black.

Baking blue prevents the steel from rusting. Most of the guns are blue-baked. It may be water and protective gases (e.g. nitrogen) that are put in

In chrome plating, pre-treated metal or plastic parts are electrochemically placed in a chromate solution.

The process results in a layer of bright silver metallic chromium on the surface of the part.

cladding to achieve antiseptic and decorative effects. It is commonly known as "electroplating".

Bake blue is just the parts moistened with water and then burned with fire, pay attention to the water is best to be pure, if not pure, there will be markings, such as the two ends of the hacksaw blade polished by themselves, it is best to buy a few pieces of fine water sandpaper, dip in water and polish in one direction, do not reciprocate grinding, and be patient, the force should be moderate and even, the temperature should not be too high when roasting on the fire, until the color changes, otherwise the magazine will be annealed, and it is also possible to bake on the stove on the gas, but the gas is impure and easy to change color and have to start again. The color is the color of burnt iron Put it in a boiling thick soap solution and soak it for 10 minutes, (saponification) and finally soak it in hot oil

Bake blue is just the parts moistened with water and then burned with fire, pay attention to the water is best to be pure, if not pure, there will be markings, such as the two ends of the hacksaw blade polished by themselves, it is best to buy a few pieces of fine water sandpaper, dip in water and polish in one direction, do not reciprocate grinding, and be patient, the force should be moderate and even, the temperature should not be too high when roasting on the fire, until the color changes, otherwise the magazine will be annealed, and it is also possible to bake on the stove on the gas, but the gas is impure and easy to change color and have to start again.

The main reason for this is chrome plating, in which pretreated metal or plastic parts are placed in a chromate solution and treated by electrochemical process to form a bright silver metallic chromium coating on the surface of the parts to achieve anti-corrosion and decorative effects.

Chemicals such as sodium nitrate oxidize the surface of metals into oxides at high temperatures, forming a protective layer that is more resistant to corrosion.

This is because iron can chemically react with water at high temperatures to produce hydrogen and ferric tetroxide.

At high temperatures, the metal surface is oxidized to oxide to form a protective layer that is more resistant to corrosion.

This is because iron and water react chemically at high temperatures to form iron oxide.

This is a special principle, if you polish the two ends of the hacksaw blade by yourself, it is best to buy a few pieces of fine water sandpaper, dip it in water and polish it in one direction, do not grind it back and forth, and be patient.

Water is the source of life, and we should use it for months.

Of course, it tastes good on the iron sheet, and the key is whether you have electric heat or charcoal under it! Grilled barbecue with charcoal is delicious.

The oven generally refers to resistance heat, which is the heat generated by the resistance current of the conductor is also called ohmic heat, or the heat generated by the infrared quartz lamp, which belongs to the radiant heat of infrared, which is heated from the surface to the inside, and the speed is slow. Microwave is a kind of electric field on the molecules of the medium, the thermal effect is generated, so that the polar molecules rotate at high speed, and the molecules rub against each other, generating heat at an extremely fast speed. Microwaves can only heat the medium, not the metal, which will cause microwave reflection, resulting in damage to the microwave tube.

The oven can heat metal, you can use metal trays, and the temperature of the food oven is not high, which is easy to control. The microwave oven heats up quickly, and the temperature is not easy to control.

The heating principle of an electric oven is different from that of a microwave oven, and an electric oven is a resistance wire that becomes hot by applying electricity, and then converts electrical energy into heat energy. A microwave oven converts electrical energy into microwaves, which are then circulated through the oven to make food hot. Microwave ovens pay more attention to the heating method of fast heating and convenient heating.

You can put iron sheets in the oven, but you still don't need it for safety reasons.

The oven can be placed in a metal container, but the microwave oven is not, and the microwave oven can produce an electric spark and cause a dangerous situation.

The oven is heated by an electric heating tube, microwaved and microwaved, and the iron sheet can be placed in the oven.

Inside the oven is an electric heating tube, and the temperature of the heating tube is high after the electricity is turned on, while the microwave oven is heated by electric shallow magnetism, relying on electric waves.

The oven is heated in all directions. The food from the microwave is not tasty. It should be fine to put iron sheets in the oven.

The ovens are electrically heated, so it doesn't matter if you can put anything in it. Person.

The oven is directly heated by electricity, and the microwave oven uses the principle of molecular thermal movement. Do not put iron sheets in the oven.

What is the difference between a microwave oven? The oven uses well, the electric fire is baked out to bake things, the microwave oven is suitable for the microwave oven, can you put iron sheets in the oven? It seems that you can't put banned films, you have to put iron sheets in the oven to make up for the exam, for what?

Hello, the oven is used for baking, bread is called flower chicken, etc., need a lot of heat, what about the microwave? It is the function of heating food, but its heat is not as hot as the heat of the oven, this is the difference between the oven and the microwave oven, the oven can put iron sheets in it.

An oven cooks food by heating it directly. Whereas, microwave ovens heat food by creating vortex currents. Iron sheets are allowed in the oven, but not in the microwave.

The gap between the oven and the microwave oven is very large, and the oven cannot put iron sheets in it.

Oven heating is the process of baking food from the outside in; The microwave oven is heated by microwave to diffuse and vibrate the watery parts of the food, that is, to heat from the inside out.

Iron sheets can be placed in the oven.

The main function of the oven is to bake food, and the microwave oven can not only heat up the food, but also cook the rice, cook the vegetables, etc. The oven can be used to put iron sheets.

The oven is a microwave oven heated with infrared rays, it is heated with a microwave, and there is no problem with putting iron sheets in the oven, but it cannot be put in the microwave oven.

It seems to be much better than the microwave, the temperature inside the oven will be higher, and he can cook all three things.

Can you put iron pieces in the oven? Why put iron sheets in the oven? I don't understand.

There is a difference between an oven and a microwave, why put iron sheets in the oven?

Go to Guangfu Road, there are various specifications, and sticks, dozens of dollars a very convenient, I remember that there is a rental stove in Changchun, and there are skewers, all ready-made, very convenient, but **forgot

Why do you have to go to a blacksmith shop, find an electric welding processing point, buy an iron plate or white steel plate, and ask him to process it for you.

Blacksmith Shop Oh.

I guess you can't find it in Changchun.