Aluminum electrolytic brightener polishing solution does not contain chromic acid

Aluminum electrolytic brightener
●Main uses
This product is used for electrolytic polishing of various aluminum alloys, pure aluminum and other types of aluminum. It has low cost and obvious effect. It can achieve mirror bright effect and aluminum polishing. The final gloss is long-lasting, beautiful and elegant, which increases the added value of the product.
●Main advantages
The polishing fluid does not contain chromic acid and complies with current environmental protection requirements, saving investment in environmental protection equipment and wastewater treatment costs.
.The polishing current density is smaller than that of the traditional process, so it not only has low power consumption and long service life of the polishing fluid, but is also more suitable for surface polishing of large aluminum and aluminum alloy parts.
, wide application range, suitable for pure aluminum and various types of aluminum alloys with silicon content greater than %.
●Operation method
. Tank ratio
Concentrated phosphoric acid (specific gravity)/
Aluminum electrolytic additive/

Temperature/degree
℃< br/> Anodic current density, D
/d㎡ (higher than required for stirring)
Voltage
Volts
Polishing time
dh minutes
Cathode material
Lead or stainless steel
Cathode area: Anode area
dh:

. Configuration method
. The polishing fluid before use The proportion of is within the range of .dh. According to the volume of the polishing liquid to be prepared, the specific gravity of the polishing liquid and the weight ratio of phosphoric acid in the polishing liquid, calculate the amount of phosphoric acid to be added and add it.
, also calculate the weight of the donkey additive required and add it.
, heated to operating temperature.
●Notes
Whether to use stirring (cathode movement, air stirring) during polishing mainly depends on the shape of the polishing piece: if the shape of the polishing piece is simple and the lateral width is narrow, stirring is not used. On the contrary, if The polishing part has an irregular shape or a large lateral width, especially when some parts of the polishing part prevent gas from escaping to form air pockets, which affects the surface polishing. Stirring must be used. When stirring is used, the anode current density must be increased accordingly, otherwise it will be difficult to achieve high brightness on the polished surface.
During polishing, most impurities are deposited on the cathode surface, but some solid sludge generated by polishing still remains in the polishing fluid. Therefore, the polishing fluid needs to be filtered regularly to remove impurities.
During the polishing process, due to the generation of phosphate, the electrolysis and volatilization of water, and the entrainment loss of the polishing fluid, it is necessary to continuously replenish phosphoric acid and Zhengbang brand aluminum electrolytic additives.
The original specific gravity of the polishing fluid after preparation and before use is within the range of .dh. During the operation of the polishing tank, the specific gravity of the polishing fluid should be controlled within the range of .dh. If the specific gravity of the polishing fluid is too high, it means that the water content of the polishing fluid is insufficient. On the contrary, if the specific gravity of the polishing fluid is too low, it means that the water content of the polishing fluid is too high and the phosphoric acid content is low. Often using a hydrometer to measure the specific gravity of polishing fluid is an effective means to control the concentration of polishing fluid components and polishing quality.
Long-term polishing at a high anode current density may cause the aluminum content in the polishing liquid to be too high (the presence of semi-melted material on the top of the polishing liquid is a sign of excessive aluminum content), and new polishing liquid must be used at this time. Partial replacement to reduce the aluminum content in the polish.