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The mostcomprehensive  in history 100 Q & A
 The most comprehensive plating knowledge in history 100 Q & A
1. why can electrolyte conduct electricity? Answer: electrolyte conduction and metal conductor conduction is not the same. In metal conductors, the current is transported by the motion of free electrons, while in the electrolyte the current is transported by charged ions. In electrolyte, because the charge of positive and negative ions is equal, so it is not electrical. We are called electrical neutrality. When we apply the voltage to the electrolyte, the ions run to the electrode opposite to their polarity because of the attraction of the powerful electric field. The cations run toward the cathode and the anions run to the anode. Their motion causes the current to pass through, which is the reason why the electrolyte conducts electricity. 2. in the process of plating, hanging plating liquid is heat hot, because of too high temperature caused? Answer: Although the hanger has a relationship with the heating temperature of the solution, but the main reason is: (1) the rack current is too large. (2) on the rack is bad, the resistance increased hanging fever. 3. what are the main factors controlling the thickness of the plating layer? Answer: the main factors controlling the thickness of electroplating layer are current density, current efficiency and plating time. 4. brass coating and bronze coating is the same layer of gold coating? Answer: No, brass coatings are alloy deposits of copper and zinc, and bronze coatings are alloy deposits of copper and tin. 5. what does Faraday's Law mean? Try Faraday's first law and the second law Answer: Faraday's law describes the relationship between the amount of electricity passed on the electrode and the weight of the electrode reactant, also known as the law of electrolysis. Faraday's first law: the weight of metals when they are electrolytic is proportional to the current and time passed in the electrolyte. (1) W=K*I*tW - precipitation weight of material (g) - K (electrochemical equivalent) I ratio constant - current intensity (AMP) t conduction time (hours) of Faraday's second law: the same current through different electrolytes, chemical precipitation of metals and the equivalent weight of the electrolyte is proportional to the. (2) K=C*EC - proportionality constant. E - chemical equivalent 6. why plating parts from chemical degreasing to weak acid corrosion (micro corrosion), the middle should be washed by clean water? Answer: because the usual chemical degreasing solution is alkaline, if the oil solution is directly brought into the acid corrosion (micro corrosion) solution, it will neutralize the reaction of acid and alkali, and reduce the concentration and effect of acid. The formation of neutralization reaction adheres to the workpiece, which will affect the quality of the coating. Therefore, after the chemical degreasing, must be washed clean water, to enter the acid corrosion solution. 7., electroplated coatings appear burr, coarse particles, usually those causes, how to solve? Answer: the coating appears burr, coarse grain, it is plating liquid to be caused by pollution of suspension impurity mainly. Its sources are: dust in the air, sludge from the anode, and hydrolysis products of metallic impurities. In addition, there are abnormal bath composition and operating conditions are not required, and so on. The solution is to adjust the bath composition and operating conditions. If it is suspended impurities, the plating solution should be filtered. 8. what's the basic procedure for preparing the plating solution? Answer: the basic procedures for preparing the electroplating liquid are as follows: (1) the desired amount of the solution is first put into the slot (small groove), then add some water to dissolve it, and pay attention not to pour the medicine directly into the plating bath. (2) impurities contained in the solution can be removed by various chemical methods and treated with activated carbon. (3) the solution has been disposed of, filtered into the clean plating tank, add water to the standard quantity. (4) adjust the plating process specification (pH value, temperature, additives, etc.). (5) electrodeposition is carried out at low current densities to remove impurities from other metal ions until the solution is suitable for operation. 9. why do you want to use insulating materials? Answer: in addition to the general manufacturing hanger hook and product contact conductive part, the other shall be coated with insulating materials, to reduce the current loss and loss of metal products, to ensure the effective area of plating, improve the current, and the durable hanger. 10., sulfuric acid and hydrochloric acid derusting effect? Nitric acid can rust? Answer: products rust in general to use concentrated hydrochloric acid, the best effect, can achieve high efficiency, even if the time is too long, nor cause excessive corrosion, damage to the matrix metal phenomenon. Sulfuric acid to remove surface rust stains better, but rust is very slow, and the time is too long, and corrosion, the product matrix damage. Nitric acid can not be used for rust removal, because of its strong oxidation, when the metal is oxidized, producing a large number of nitric oxide, toxic gas. What is the influence of 11. plating treatment on the quality of electroplated coatings? Answer: from the long-term production practice has proved that the quality of electroplating production occurred most of the accident is not caused by the electroplating process itself. Mostly due to improper plating of metal products. The quality of the coating is closely related to the quality of the coating, such as flatness, adhesion, corrosion resistance and so on. The surface condition and cleanliness of metal products before electroplating are important links to obtain high quality coatings. It is difficult to obtain smooth and bright coating on the rough metal surface, and the porosity of the coating is too large to reduce the corrosion resistance. If there is a metal surface grease, also cannot get normal coating. 12. what is the definition of free cyanide in cyanide bath? Answer: in cyanide solution, unbound excess cyanide in the complex is called free cyanide. For example, the free cyanide in cyanide copper plating bath is the excess cyanide that forms the [Cu (CN) 3]= complex ion. 13., in cyanide copper plating, the anode produces passivation, poor dissolution, ionization
Japan Chuanshan Circuit Board Equipment Co., Ltd. was established in 1982, has experienced more than 30 years of growth and development. Over the years, we are committed to the development and manufacture of circuit board equipment for the circuit board industry to provide superior quality products and high quality Our main products include: Horizontal Wet Process Line, Cabinet and Tunnel Oven and Peripheral Automation Equipment. 1982 - 2008 We focus on Japan and Europe and the US market, 2010 We are in China And Southeast Asia and other regions, serving more than 500 circuit board manufacturers, is Japan's largest manufacturer of circuit board equipment one of the superior production results, handy operation, simple and efficient maintenance and safe and reliable operating system design concepts are It is the leading edge of the circuit board equipment industry, and has always been committed to the development and manufacture of circuit board equipment and ISO quality management system international standard. It is the quality of continuous operation of Chuanshan The company has developed a quality manual that meets ISO requirements, identifies service standards, document control systems, and speaks for all Related courses, in August 1985 and August 1990, respectively, passed the ISO-900 and ISO9001: 2000 BSI international certification. In September 1995, Chuan Shan successfully passed DNV certification CE, which not only proved that the Chuan Shan The results of efforts over the years, but also fully shows that we have been in progress, to make better products and efforts to enable customers in the production process as well as product quality to obtain greater protection.We use high precision CAD / CAM and the most Advanced simulation system to establish the unit structure, to its program, greatly improving the stability and reliability of the machine.We believe that advanced machinery and equipment and continuous improvement of production technology is the guarantee of high quality products.Therefore, we continue to introduce A large number of automated production systems, coupled with professional technical staff to meet the increasing quality of customer requirements. Chuan Shan has more than 1,000 professional technical staff, in accordance with the requirements of the project, provided by the Department of professional design and specification review, production Responsible for precision manufacturing and assembly, QC is rigorously tested to ensure the high quality of the product.With the increasing technical requirements of the industry, we have systematically More than 80 professionals from Japan and the United States are responsible for the development of research work, through their rich experience, the development of more advanced production technology and the development of high-quality, high-precision, Products, so that Katsuyama to maintain the leadership position in the market.In order to allow customers to fully appreciate the spirit of service Sichuan, we consider the needs of customers from various aspects and provide assistance; such as technical support, the effective supply of spare parts and professional advice To provide, etc. There are well-trained technical staff responsible for the installation of the machinery and equipment, operation training and maintenance works, Mu can provide the most complete after-sales service. Welcome to have the skills of the community to join!