What should be paid attention to when hot-dip plating the surface of the E1809 rail clamp
Sep 13, 2024| 1. Preparation before plating
Thoroughly clean the surface of the rail clamp: Before hot-dip plating, it is necessary to ensure that there is no impurities such as oil, rust, dust, etc. on the surface of the rail clamp. It can be cleaned with a chemical cleaning agent, then rinsed with clean water, and then dried. Otherwise, impurities will affect the bonding strength between the coating and the substrate, causing the coating to fall off easily.
Check the quality of the rail clamp: Carefully check whether the rail clamp has defects such as cracks and pores. If there are defects, they should be repaired first to avoid the defects from expanding during the hot-dip plating process, affecting the quality of the coating and the performance of the rail clamp.
2. Control of hot-dip plating process parameters
Plating solution temperature: It is crucial to strictly control the temperature of the hot-dip plating solution. If the temperature is too high, the coating may be too thick, the brittleness may increase, and the rail clamp may even deform; if the temperature is too low, it will affect the adhesion and uniformity of the coating.
Dipping time: Reasonably control the dipping time according to the size, shape and material of the rail clamp. If the immersion plating time is too long, the coating may be too thick, which not only increases the cost, but also may affect the assembly accuracy of the guide rail clamp; if the immersion plating time is too short, the coating may be uneven or insufficient in thickness, and it cannot provide good anti-corrosion protection.
Raising speed: When the guide rail clamp is raised from the plating solution, the speed should be moderate. If the speed is too fast, the coating may be incomplete, and problems such as flow marks and leakage plating may occur; if the speed is too slow, the coating may be too thick, increase the internal stress of the coating, and reduce the quality of the coating.
3. Post-plating treatment
Cooling method: Choosing a suitable cooling method has a great influence on the quality of the coating. Air cooling or water cooling can be used, but it should be noted that the cooling speed should not be too fast to avoid stress concentration and cracks. At the same time, during the cooling process, ensure that the guide rail clamp is evenly cooled to avoid local overheating or overcooling.
Surface treatment: After hot dip plating, there may be some excess zinc nodules or impurities on the surface of the guide rail clamp. Surface treatment is required, such as mechanical grinding, sandblasting, etc., to make the coating surface smooth and flat to improve the appearance quality.
Quality inspection: Strict quality inspection is carried out on the rail clamps after hot dip plating, including appearance inspection, coating thickness measurement, adhesion test, etc. Ensure that the coating quality meets the requirements. If there are unqualified products, they should be reworked in time.
4. Safety and environmental protection
Safe operation: During the hot dip plating process, operators must strictly abide by the operating procedures and wear protective equipment such as gloves, goggles, protective clothing, etc. to prevent accidents such as burns and poisoning. At the same time, to ensure the safe operation of the equipment, regular maintenance and inspection are required.
Environmental protection measures: A certain amount of waste gas, waste water and waste residue will be generated during the hot dip plating process.
If you are interested in learning more about the things that need to be paid attention to when hot dip plating the surface of the E1809 rail clamp, please visit www.lanlingrailway.com!