Products Description
Titanium anode plates for trivalent chromium electroplating are anode materials used in electroplating processes and are usually used for trivalent chromium electroplating on metal surfaces. Trivalent chromium electroplating is an environmentally friendly electroplating process used to form a corrosion-resistant and aesthetically pleasing chromium coating on the metal surface.
Titanium anode plates for trivalent chromium electroplating have good corrosion resistance and conductivity and are suitable as anode materials in electroplating processes. In the trivalent chromium electroplating process, titanium anode plates can be used as anodes in electroplating tanks to form a uniform and dense chromium coating on the metal surface through the action of current and electrolyte.
Using titanium anode plates for trivalent chromium electroplating can reduce environmental pollution, and can also improve the efficiency of electroplating and the quality of the coating. Therefore, they are widely used in some electroplating processes with high environmental requirements.
In trivalent chromium electroplating, trivalent chromium salt is usually used as the electroplating solution, combined with appropriate current and electrolyte, to form a uniform and dense chromium coating on the metal surface through electrochemical reaction. This coating has good corrosion resistance and decorative properties, which can improve the surface quality and service life of metal products.
Because the trivalent chromium electroplating process is environmentally friendly, it is widely used in some fields with high environmental protection requirements, such as automobile manufacturing, furniture manufacturing, decoration engineering, etc. At the same time, trivalent chromium electroplating is also more friendly to the health of operators because it does not produce harmful gases of hexavalent chromium.
(1) Low toxicity and little pollution. The plating solution cleaning water does not contain hexavalent chromium, and the wastewater can be discharged after a little treatment, and the electroplating process does not produce toxic chromic acid mist;
(2) The plating solution concentration is low, only 1/10 of hexavalent chromium plating, with good dispersion and covering ability, and improved yield;
(3) The electroplating process is not affected by current interruption and no stripping is required;
(4) The cathode current efficiency can reach 21-25%, which is higher than hexavalent chromium electroplating, thus improving productivity
Products show
Company introduction
FOCUSED ON HIGH OUALITY TITANIUM MATERIAL
Baoji JM-TITANIUM Company is a manufacturer of titanium anodes for trivalent chromium electroplating with many years of technical experience. The titanium anodes for trivalent chromium electroplating it produces have high current efficiency, good conductivity, good electrocatalytic performance, strong oxidation resistance, long working life and energy saving.
Product Process
1. Purchase the GR1 titanium substrate to ensure that the surface of the plate is smooth and flat, without deep scratches and defects.
2. Machining the purchased titanium substrate and processing it to the size required by the customer.
3. Annealing and leveling the titanium substrate at a temperature of >500 °C. (To eliminate stress and ensure flatness.)
4. When the annealing leveling treatment, a dense titanium oxide layer is formed on the surface of the titanium substrate, and it is polished by mechanical or artificial means, and the surface thereof is made of titanium metallic luster.
5. The titanium substrate is subjected to pickling etching with 10% strength oxalic acid, and is subjected to a micro-boiling state for several hours to etch the surface oxide layer into a titanium hydride surface.
6. Qualitative and quantitative configuration of the precious metal solution according to the anode environment applied by the customer.
7. Detecting that the pickled titanium substrate is qualified, that is, the surface layer is gray uniform matte structure, and then manually coating and arranging, sintering at a set temperature, sintering naturally, cooling, and cooling to normal temperature for a second coating Resume, and so on, until the configuration solution is finished after 17~20 times.
8. After the sintering of the above processed parts is completed, the life test will be carried out with the test piece of the furnace, and the qualified package will be shipped.
Working principle
The cathode reaction is usually considered to be that the trivalent chromium complex ion obtains an electron and becomes a divalent chromium complex ion, and then the divalent chromium complex ion is reduced to metallic chromium again. The specific process is: during the electroplating process, the trivalent chromium complex ion in the plating solution diffuses to the cathode surface, obtains electrons on the cathode surface, undergoes a reduction reaction, and forms metallic chromium deposited on the cathode. At the same time, there may also be a side reaction of hydrogen evolution at the cathode. The anode reaction is mainly an oxygen evolution reaction. If it is a chloride system, a side reaction of chlorine precipitation may occur; if there is a certain amount of hexavalent chromium in the plating solution, a side reaction of trivalent chromium oxidation to hexavalent chromium (Cr₂O₇²⁻) may also occur. In order to inhibit the formation of hexavalent chromium, it is usually necessary to consider and control it from the anode aspect, such as using a suitable anode material or adding a stabilizer. For example, graphite, platinum, titanium-plated anode or ferrite anode can be used. Among them, the ferrite anode can control the gradual increase of hexavalent chromium and prevent its generation during the electrolysis process. It is composed of a sintered mixture of iron oxide and at least one other metal oxide.
Other knowledge
Acidic electrolytic solutions are widely used in the electroplating industry, and oxygen evolution reaction occurs on the anode. Iridium dioxide has a high antioxidant capacity. The ternary IrO-SnO-Pd coating composed of Sn, Pd and other elements is an excellent insoluble anode in acidic electrolytic solution. The IrO-SnO-Pd/Ti electrode was prepared by thermal decomposition. The anodic characteristics of the electrode in 1MH2S04 and 30%H2S04 were studied by electrode potential and polarization curve measurement and accelerated anode life test. The surface morphology and profile of the coating were further analyzed by scanning electron microscopy. The results show that the IrO-SnO-Pd coating has good electrocatalytic activity and electrolytic durability. When used in acidic electrolytic solution, it has the advantages of good stability, large current and long working life. Therefore, this type of anode has found application in steel plate galvanizing, acid copper plating, trivalent chromium electroplating and precious metal electroplating.
The advantages of trivalent chromium electroplating process include: Low toxicity and low pollution: the plating solution does not contain hexavalent chromium in the cleaning water, and the wastewater can be discharged after a little treatment. The electroplating process does not produce toxic chromic acid mist, which is more environmentally friendly and reduces the harm to operators. Low concentration of plating solution: generally only about 1/10 of hexavalent chromium plating, the amount of plating solution taken out is small, so the wastewater treatment is relatively easy. Good dispersion ability and covering ability: the yield rate is improved. High electroplating speed: the plating speed can reach 0.2μm/min, which can shorten the electroplating time. High current efficiency: can reach more than 25%. Can work at room temperature: the plating solution can work at room temperature, thus saving energy. Good corrosion resistance of the coating: microscopic discontinuous chromium coating can be directly plated. Not affected by current interruption: during electroplating, even if the current is interrupted, it will not affect the bonding force, and no deplating is required.
There are also some disadvantages of trivalent chromium electroplating process: It is difficult to increase the thickness of the coating: it can only be used for decorative chromium plating at present, functional chromium plating is difficult, and it is difficult to plate thick chromium. Complex plating solution composition: poor stability, low tolerance to impurities, and difficult maintenance and management. Poor appearance and color of the coating: When decorative chrome plating, the color may not be as ideal as hexavalent chrome plating. High equipment investment and cost: The initial equipment investment is large and the cost is relatively high.
Shipping and Packing
Transportation method
Express (DHL, Fedex, UPS, national special line) air transportation, sea transportation, land transportation, multiple ways to meet your needs
Port:
Tianjin, Shanghai, Qingdao or any other Chinese main port.
Lead Time:
2-15 days after payment confirmed.
Packaging Details:
1. Inside: Kraft papers, plastic bags, polyethylene foamed sheet;
2. Outside: packing: wooden box;
3. Or according to customer requirement.
Contact
Contact us for more information. Thank you
Nicole
Company: Baoji Jimiyun Dynamic Co., Ltd
Country:China
Add:Baoti road,Jintai,Baoji city,Shaanxi,China
Cel:+86 18391896637
Gmail:Nicole@jmyunti.com
Website:www.jm-titanium.com
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