The spraying process shall follow the following steps. The wear resistance of surface treatment sandblasting spraying (grinding) coating is a very important index. The wear resistance of wCCo/NiCrMo coating sprayed by spraying method is more than 2.5 times that of chromium plating. The corrosion test of WC, CoCr (JK120) coating sprayed by spraying method with small wear amount includes ASTM Bl17 salt spray test, GM9540P/B cyclic corrosion test and atmospheric corrosion test. 4340 steel surface was treated by chrome plating, WC Co spraying and Tribaloy400 spraying. After 500h salt spray test, wGCo coating had good corrosion resistance. It is reported that the salt spray corrosion resistance of sprayed WC Co, wGCo Cr, Cr203 and WC-17Co (JKl17) coatings is better than that of chromium plated coatings. WC CoCr (JK12O) coating has no corrosion after 750h salt spray corrosion. After 18 months of atmospheric corrosion test, the WC Co coating has almost no change.

How to select the connector of pneumatic butterfly valve
Because the quality of pneumatic butterfly valve joints on the market is different, so the quality of joints is also different. Customers can hardly distinguish the joint and appearance. What causes joint cracking? What aspects should we pay attention to to avoid the outbreak of separation? How should I obtain evidence when presenting problems? How to safeguard your rights and interests?
It is understood that it is still difficult to determine the source of the joint cracking. At present, the National Bureau of Technology and Quality Supervision has issued the Recommended Specifications for Sealing Water Nozzles and the Specifications for Hoses, which more perfectly formulate the rules for the purpose of quality specifications for joints and hoses. Users can check the torque Tightness of the joint spool and strength of the joint material. If the content of the rule is not reached, it is attributed to quality problems, which can be used as a strong basis for the statement
The long-term use of pneumatic butterfly valve connector at home usually does not cause concern, but to a certain extent, frequent use and improper maintenance also pose a hidden danger of seam embedding. It is understood that the service life of the joint is usually 200000 times, and it should be replaced after long-term use. When using the side, try to pay attention to the switch of the light, and do not repeatedly rotate the hose connector knob
According to Jiangyan Xinxing Pipe Fittings Factory, the quality inspection base, in order to find profits, reduce costs and reduce the quality of goods, the use of cast iron (rusty) and zinc alloy (anti-corrosion) materials to consume pneumatic butterfly valve connectors has caused quality problems of goods. It is understood that the quality of connectors and hoses is not up to standard, and the strength and sealing functions of pneumatic butterfly valve connectors cannot be standardized due to problems such as materials and wall thickness, Should arouse the attention of consumers