Stainless steel " target=_blank> stainless steel electrolytic polishing solution ZSD501 polishing principle and effect display
First of all, I will explain the principle of electropolishing. The currently accepted theory is mucosal theory. The theory is mainly: the metal ion detached from the workpiece and the phosphoric acid in the polishing solution form a phosphate film adsorbed on the surface of the workpiece. The mucosa is thinner at the convex portion, the concave portion is thicker, and the current density is high due to the convex portion. The dissolution is fast, as the mucous membrane flows, the irregularities change, and the rough surface is gradually leveled. That is to say, the workpiece to be polished is the anode, the insoluble metal is the cathode, the two poles are simultaneously immersed in the electrolytic cell, and the selective anode is dissolved by the direct current, and the surface of the workpiece is gradually leveled, thereby achieving the effect of increasing the surface brightness of the workpiece. .
Stainless steel "target=_blank> stainless steel electrolytic polishing solution ZSD501 is commonly used in various types of stainless steel such as 304, 321, 316, 201, 202, 420, 430, etc." target=_blank> stainless steel electrolytic polishing, low cost of use The effect is obvious, and the mirror surface brightness effect can be achieved. The stainless steel "target=_blank> stainless steel has a long-lasting gloss and beautiful appearance, which increases the added value of the product.
Advantages of electropolishing: (1) The color inside and outside is consistent, the gloss is long-lasting, and the recess that can not be thrown by mechanical polishing can be leveled. The high-quality substrate can be processed to a mirror effect in a few minutes. (2) High production efficiency and low cost. (3) Increase the corrosion resistance of the workpiece surface, suitable for all stainless steel "target=_blank> stainless steel materials. (4) The polishing current density is small, the voltage is low, and the power consumption is more than 1 times lower than the traditional process. (5) The polishing solution does not contain chromium ions. In line with today's environmental protection requirements, saving investment in environmental protection equipment and wastewater treatment costs.
Instructions
The stock solution is used, the lead plate is used as the cathode (negative electrode), the workpiece is made as the anode (positive electrode), 60-65 degrees, the current density is 10-25 amps/square decimeter, the voltage is 8-10 volts, and the time is 5-8 minutes.
Recommended process: (degreasing and derusting activation → washing → drying) → electropolishing → washing → passivation → washing → neutral → washing
Electrochemical polishing requirements and equipment
(1) Power supply: Three-phase 380V power supply.
(2) Stainless steel "target=_blank> stainless steel electrolytic polishing machine. Stainless steel "target=_blank> stainless steel electrolytic polishing is not too strict on the power supply waveform, you can use thyristor or high frequency. No-load voltage: 0-20v Load voltage (operating voltage), 8-10v working voltage is lower than 6v, polishing speed is slow, and the brightness is insufficient. Rectifier current: Depending on the size of the customer's workpiece.
(3) Electrolytic tank and supporting facilities (anode rod). It can be welded by hard PVC sheet. Install three electrode rods on the groove, with a movable anode rod in the middle, connect the anode of the power supply (or the positive pole), and the cathode rods on both sides, connect the cathode of the power supply (negative pole).
(4) Heating facilities and cooling equipment. 1 heating can use quartz heating tube, titanium heating tube. 2 Cooling optional coil, the coil can be heated to cool.
(5) Fixture. Titanium is best used as a hanger because titanium is more resistant to corrosion and has a long life. Titanium ions have no effect on the bath. It is recommended not to use copper hangers, because copper ions will deposit a layer of copper with poor adhesion on the surface of stainless steel "target=_blank> stainless steel, which will affect the polishing quality. The exposed parts of copper can be baked with PVC glue. , scrape off the insulating film at the contact point.
(6) Anion and anode materials. The anode and cathode rods are coated with copper rods or copper tubes. The length of the copper tubes is 20 cm for the length of the electrolytic cell. The lead plates are applied to the cathode plates. The lead plates are fixed on the cathode rods. The length of the lead plates is 10 cm and the width of the lead plates is according to the grooves. Long, usually 10 cm, 20 cm size.
Precautions
1. Stainless steel "target=_blank> stainless steel general electrolytic polishing solution will produce foam during electrolytic polishing at the beginning of its use, so the distance between the liquid level of the polishing liquid and the top of the polishing tank should not be ≤ 15cm.
2. Stainless steel "target=_blank> stainless steel workpiece should remove the moisture remaining on the surface of the workpiece before entering the polishing tank. Due to the excessive moisture in the workpiece, the polished surface may be seriously pitting, and partial etching may cause the workpiece to be scrapped. .
3. In the process of electropolishing, the stainless steel "target=_blank> stainless steel workpiece as the anode, the iron and chromium elements contained in it are continuously converted into metal ions dissolved in the polishing liquid without depositing on the surface of the cathode. The concentration of metal ions is increasing. When a certain value is reached, these metal ions are continuously precipitated from the polishing liquid in the form of phosphate and sulfate, and settled at the bottom of the polishing tank. For this reason, the polishing liquid must be periodically filtered to remove these solid precipitates. Object.
4. During the operation of the polishing tank, the phosphoric acid and sulfuric acid are continuously consumed, and the external moisture is lost due to evaporation and electrolysis. In addition, the high-viscosity polishing liquid is continuously lost by the workpiece entrainment, and the liquid level of the polishing liquid is continuously decreased, and it is necessary to frequently add to the polishing tank. Fresh polishing liquid and water
This article comes from: (Shenzhen Zhongshida Surface Treatment Technology Co., Ltd.) http://://news.chinawj.com.cn Editor: (Hardware Business Network Information Center) http://news.chinawj.com.cn
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