Mr. Tu from Wenzhou, Zhejiang Province is the owner of a processing plant that processes plastic plating and multi-layer nickel plating. Recently, Mr. Tu found that the palladium activation working solution he used in the production process would produce more hydrochloric acid fog. Considering that the acid fog would pollute the environment and harm human beings, Mr. Tu wanted to find a colloidal palladium water without acid fog.
Electroless nickel plating technology is famous for its good corrosion resistance, uniform coating thickness and hardness. After the use of electroless nickel plating solution Ni-811, the hardness of the coating can reach 550-650 HK100 after plating. Then, through further heat treatment at 400℃ for one hour, the coating hardness can be further increased to 850-950 HK100. Why is Ni-811 so special? We will examine this problem in the following.
Mr. Liu in Huizhou, Guangdong Province, is an electroplating factory owner engaged in the galvanization processing of various hardware products and stamping parts. Recently, Mr. Liu found that the black passivation solution always exceeds the phosphorus standard when discharging wastewater, as this violates the discharge standard of the electroplating park, so Mr. Liu would like to replace a phosphorus-free black zinc passivation solution in a hurry.
Bigely trivalent chromium galvanized black passivation solution BZ-216 is a black passivate designed for pickled zinc deposits in the galvanizing process. It produces a dense, homogeneous and highly corrosion resistant black passivate film on the galvanized surface, which enhances the decorative and protective properties of the coating.
The galvanized blue and white passivation process is widely used in corrosion prevention applications, however, sometimes the process fails to pass the 96-hour salt spray test, which has caused a lot of concern in the industry. One of the main reasons for this problem is the quality of the passivation solution.
In the acid galvanizing process, the bonding of the coating is affected by a number of factors, and it is critical to ensure good adhesion of the coating to the substrate. Factors affecting adhesion include surface preparation, bath composition and operating conditions.
