? Tongxing Copper is a relatively large manufacturer in Hartmann film industry, and the latest double-sided polishing technology is unique in China.
? Brass Hastelloy is specially used to determine the content of sulfate in chromium plating solution. The rapid analyzer for sulfuric acid is simple, fast and has small error. Without making working curve, the content of sulfate in plating solution can be accurately determined in just over ten minutes.
The shortcomings of titration and gravimetric method, such as complexity, long time and large error, have been successfully solved, and they are necessary instruments for chromium plating process analysis.
Tongxing copper Hastelloy plate has nine specifications:
100*65*0.2mm (unpolished)? 100 tablets/box
100 * 65 * 0.2mm (single-sided polishing)100 pieces/box
100*65*0.2mm (double-sided polishing) 100 pieces/box?
100*65*0.25mm (unpolished)? 100 tablets/box
100*65*0.25mm (single-sided polishing) 100 pieces/box
100*65*0.25mm (double-sided polishing) 100 pieces/box?
100*65*0.3mm (unpolished)? 100 tablets/box?
100*65*0.3mm (single-sided polishing) 50 tablets/box.
100*65*0.3mm (double-sided polishing) 50 tablets/box.
The latest research progress of double-sided polishing technology of Hargreaves thin films is listed.
Brief introduction of Hull battery experiment
Hull trough, also known as Hall trough, Hargreaves trough, Hall trough and so on, are all Chinese transliteration of English HULL CELL. Hull cell experiment is a small electroplating experiment with good experimental effect, simple operation and small solution volume. He can better determine the current density and other process conditions, such as temperature and PH value, so as to obtain a coating with qualified appearance in a short time. It is mainly used to study the interaction between the main components and additives in electroplating solution and help analyze the reasons for the failure of electroplating solution. In addition, Hull cell experiment can also measure the dispersion ability, leveling ability and internal stress of electroplating solution. Therefore, Hull cell experiment is widely used in electroplating experimental research and field production quality control.
The anode and cathode of Hull cell are not parallel, but have a certain angle. The cross section in the top view should be trapezoidal, with the anode at the height of the trapezoid and the cathode at the hypotenuse, which is the most important feature of Hull cell.
Hull cabins can be divided into three types according to the loading capacity: 267ml, 500ml, 1000ml. The most commonly used is 267ml, and the liquid level is 45 mm In Hull tank, the bottom is blown to achieve the purpose of stirring the solution, and heating is generally achieved by heating rods installed at the bottom.
Hull cell experimental method
1. Select a solution
In order to get the correct test results, the selected solution must be representative. When repeating the experiment, the volume of the solution should be the same every time. When an insoluble anode is used, the solution should be replaced with a new solution after the 1-2 test. If a soluble anode is used, replace it with a new solution after 4-5 tests at most.
2. Selection of anode and cathode materials
The anode and cathode of Hull cell are usually rectangular thin plates, the anode thickness is generally 3-5mm, and the length and width are generally 60&x；; 70mm, the cathode thickness is generally 0.2-0.3mm, generally 100& times; 65 mm.
The anode material should be the same as that used in production, and insoluble anodes such as stainless steel can also be used. In some solutions, the anode is easy to be passivated, which can be corrugated or reticulate, but the geometric thickness is not more than 5 mm Before using the chromium-plated anode, a conductive brown lead peroxide film must be obtained on the surface in another chromium-plated solution before using it. Cathode materials generally include iron sheet, copper sheet and stainless steel sheet.
In Hull cell, the distance between anode and cathode is different, so the current density distribution of each part of cathode is also different. The current density of the cathode near the anode is higher and lower and lower towards the distal end. The current density difference between the proximal and distal ends of the cathode of 267 ml Hull cell is 50 times. This is helpful to observe the coating conditions under different current densities on the same cathode, thus roughly determining the range of normal electroplating current density.
What is Hartmann flat plate, and the purpose and performance of Hartmann flat plate are all finished. I hope I can help you. The following are the origin and pictures of Hargreaves films.
Dongguan tongxing copper material
Address:No. S358 Provincial Road 133, Chang 'an Town, Dongguan City, Guangdong Province