How does inclined coil spring prevent the method of spring corrosion in advance

How does inclined coil spring prevent the method of spring corrosion in advance

Spring is often used in our daily life, but because of chemical reaction and electrochemical reaction, the contact surface of spring will be corroded to different degrees, so that the spring is damaged and the performance of the equipment will be affected. How do you prevent the spring from corroding in advance? Next, Guoyang Xiaobian will provide you with the following methods.

Spring anticorrosion methods are: painting, oxidation and electroplating three, their anticorrosion principle is to form a protective layer on the surface of the spring, the spring and the outside world separated, to achieve the purpose of anticorrosion.

First, painting: is in the spring surface central coating a layer of protective paint, is one of the main methods of spring anticorrosion. Most are used in large and medium springs. In particular, thermoforming springs and plate springs. The commonly used paint methods are spray paint and dip paint. With the development of technology, in order to improve the work efficiency, the utilization rate of paint and the quality of paint, electrostatic spraying and other new processes will be popularized.

Two, oxidation treatment: the oxidation of the spring is also called orchid or black. After oxidation treatment, the spring surface produces protective magnetic iron oxide, the thickness is about 0.6~2um. Due to thin film and many gaps, the protection ability is poor. So oxidation treatment can only be used in the corrosive medium of the spring corrosion protection. Due to the low cost of oxidation treatment, simple process formula, high production efficiency, does not affect the characteristics of the spring, so it is widely used in cold forming small spring surface anticorrosion.

Three, electroplating: electroplating is an effective method to obtain the protective layer of the metal surface, but also the main method of spring anticorrosion treatment. The coating is characterized by good adhesion, fine and compact crystallization, small porosity, uniform thickness, and good physical, chemical and mechanical functions. Electroplating is galvanized, chrome plating, copper plating, tin plating and nickel plating, the most common application is galvanized. Spring galvanized surface is generally white or color. Zinc changes little in dry air. In moist air or water containing carbon dioxide, a white film of zinc oxide is produced, which acts as a corrosion inhibitor. Galvanized layer is suitable for use under various atmospheric conditions, but in aqueous solution containing acid, alkali, salt and in pure Marine atmospheric conditions, zinc corrosion resistance is poor. Galvanized is characterized by beautiful appearance, low cost, simple process and good effect, so it is widely used in the atmosphere to use small and medium spring anticorrosion.