You will need
- - capacity for bluing
- - protective equipment
- - metal for bluing
- - abrasive material
- liquid for degreasing
- - copper sulphate
- - sulphuric and hydrochloric acid
- - Chernovetskiy soda
- - potash alum
- - water
Prepare the tank for bluing. It is desirable that it was made of galvanized steel. If you have not, you can use a wooden product. Attach to the container walls are small metal hooks. You will be able to hang the steel parts. Try to find this size of hooks, the steel does not touch the wall during the bluing.
Before subjecting the steel to the bluing, it should be treated. Under treatment refers to the process of Stripping away the oxide film and rust. This is a very important and time-consuming process. It depends on the quality of the subsequent metal coating. Start to remove end coating you can use sandpaper with a fairly large grain. Then gradually extend to processing nulevkoy. If you are trying to do the blueing in the home, for polishing you can try to use a drill with a metal brush. But this should be done very carefully, keep the pressure. If you overdo it, you will have to spend twice as much time to fix scratched the surface. Finish grinding is possible with fine emery dust.
Quality polished detail should be subjected to degreasing. The fact that the oxide film can only appear on a perfectly clean surface. Therefore, to neglect this procedure in any case impossible. Degreased the metal in different ways. The simplest option is to wipe the steel with acetone, gasoline or white spirit. But it is better to use the following method. Wash the item in soapy hot water. Then immerse in a weak solution of caustic soda. It should be noted that the increase in solution temperature has a positive effect on the quality of cleaning metal. Optimal temperature - 100 degrees Celsius. Immerse parts in a solution suitable for 30 minutes. This time is sufficient. To complete the process of degreasing rinse the steel with water or pour over boiling water.
Now you can Voronet steel. Prepare copper sulphate. It needs to be dissolved in water. Then you need to add a little sulfuric acid. About 20 drops per liter. Can now be immersed in the solution details and wait until they are painted in red color. After removing from the solution and was washed in water, need to shift steel in the following solution. It is made from chernovetskogo sodium hydroxide and hydrochloric acid. Soda need to take 800 grams per liter. And acid – slightly less than one-eighth of a Cup per liter. The solution should be warmed to boiling water. Immerse the metal for 30 seconds. To touch the parts with your hands impossible. After that, rinse in cold water steel elements, they are immersed in a final solution of potash alum and water. In the ratio of one liter of water one-third Cup of alum powder. Leave items in this solution it is necessary not less than ten hours, and can be even longer. Complete the procedure by rinsing and drying of the product. In the end, the item acquires a black color with a noble blue tint.
Please note that the blueing is conducted in a dedicated room.
Don't forget about using protective equipment when working with chemicals.