1. Coating process

The coating process of the faucet is reflected in whether the electroplating layer on the pipe body and surface is bright and flowing. Unlike nickel plating to increase the hardness of the shower head, chrome plating is primarily aimed at enhancing the decorative appearance of the shower head. Because the bathroom environment is relatively humid, long-term use of shower heads may rust and affect beauty. But there are significant differences in the chrome plating process for pipes with different materials. A good tube body is made of all copper material, and the surface needs to be treated through processes such as polishing, dust removal, nickel plating, and chrome plating to ensure that it does not turn black or blister during use. Generally speaking, from the appearance of the showerhead, the brighter and more delicate it can be seen to the naked eye, the better the coating process is.

2. Casting process

The valve body of a water nozzle is the primary component, and its production method generally uses sand casting and metal casting. Due to the high quality requirements for the appearance of the faucet, the outer surface of the casting before electroplating must not have any visible pores, cracks, looseness, or mixing; The water nozzle body made of metal mold casting has a fine structure, good external quality, high yield, and may also prevent environmental pollution caused by sand mold casting. Therefore, most manufacturers currently use metal mold casting skills. However, when using a metal mold casting water nozzle valve, its outer surface is formed by a metal mold, and the inner cavity is formed by a coated sand core. When the copper liquid is poured into the metal mold cavity, the cooling rate of the outer surface is faster, and the casting structure is fine and dense; The inner cavity is surrounded by a sand core, resulting in a slower cooling rate and a higher risk of shrinkage and loosening. Although some manufacturers choose cast brass with good data, after 24 hours of acid salt spray test, the valve body still shows loss of gloss and rust spots. The reason is that the casting process of the water nozzle body was not well processed. Therefore, it is only necessary to strengthen the design of casting molds, the melting and pouring of alloys, the control of casting processes, and the cleaning of sand drop in order to produce qualified water nozzle body castings.

3. Control of electroplating process

The appearance of the faucet is primarily electroplated with nickel chromium. The nickel chromium electroplating process has a long history, and the electroplating process is very old, with high purity of chemical materials and additives and few impurities; Moreover, the electroplating equipment is advanced, and strict process management is required during the electroplating process. The cleanliness of the tank solution, rinsing water, equipment, and production environment is adhered to, and generally, there are few electroplating quality problems. The corrosion resistance phenomenon discovered during testing is mainly due to some manufacturers reducing electroplating time and coating thickness in order to reduce costs, which cannot compensate for the fine pores of the coating. The corrosion solution corrodes the substrate through the fine pores, presenting many rust spots.

4. Pre plating polishing and cleaning of qualified nozzle castings require mechanical processing, polishing, and polishing processes before electroplating.

Machining and polishing are the shaping and polishing of products. Polishing and polishing mainly flatten the surface of the product, reduce the roughness of the casting, and can also cause minor defects such as sand holes and burrs that may occur during casting. Due to the high quality requirements for the appearance of the faucet, the coating on the outer surface of the faucet should be outstanding, the organization should be fine, smooth and uniform, the color should be uniform, the polished outer surface should be bright, and there should be no appearance defects such as bubbles, burning, detachment, or scratches. Polishing and polishing quality is a crucial factor in ensuring electroplating quality, improving surface brightness and defects. Water spouts are decorative products. It is very flexible for mixing and slag inclusion, even fine impurities may cause burrs, pitting, pinholes, and other defects on the surface of electroplating, and even result in coating burning, foaming, and peeling. If the 24-hour acidic salt spray test is conducted, it will show loss of light and rust spots, as well as bubbling and corrosion, which have been treated very important. The sand and carbonized resin in the inner cavity after casting, the oil, copper shavings, and copper powder left after machining, and the polishing paste and other pollutants after polishing are all cleaned to ensure the quality of electroplating. The presence of pollutants is the primary factor that causes burrs and pitting in electroplating.

Besides, you have to check the quality of the faucet. When choosing a faucet, the first thing to do is to open and close the handle several times to see if the feel is delicate and the elasticity is moderate. Too much looseness and tightness are not good. The brightness of the appearance is also one of the highlights. The better the surface treatment, the smoother and brighter it is, indicating better craftsmanship and indirectly reflecting its quality. In addition to looking at these, it is also necessary to check if there are any sand holes or cracks at the joints of the faucet. Trachoma is a small hole and crack that appears on the surface and inside of copper materials in the casting process. If there is a trachoma, water will seep through after passing through, and in severe cases, cracking may occur. In fact, the valve core of the faucet is an important part that cannot be seen with the naked eye. Data shows that qualified valve cores can be opened and closed 500000 times, while defective products cannot reach this strength and are prone to water leakage.

Article source: Kaiping faucet http://www.clasito.net