The phosphating of spring steel wire

Avoiding the corrosion of spring steel wire, we usually operate the method of chemical reaction to protect the spring surface. The two main kinds of chemical reaction methods. Today, I most certainly will introduce the phosphating to you, which can be commonly used by the manufactures.

Phosphating of spring steel wire is usually to put the wire into the phosphate solution with manganese, Ferrum and zinc, and then there will be a phosphate coating on the metal surface. Along with of the phosphate coating is deep grayed and gray, the thickness of the usb portscarries a good adsorption capacity to oil and lacquer. The Phosphate coating can safeguard the surface of spring steel wire from corrosion. Besides, The Phosphate coating can resist into a temperature about 400-500  °C, so the spring steel wire and that is produce for making the spring working within the high temperature usually adopt phosphating.

Before phosphate, the spring steel wire should adopt the sand blast first to remove the oil. The spring steel wire after sand blast can't put too much time, it should be phosphate immediately. During the phosphate of spring steel wire, you will see a lot of hydrogen. The spring after phosphating may have a phenomenon of hydrogen embrittlement, in like manner the spring which will easy use in the key parts, the spring steel wire ought to have hydrogen relief treatment.