The application scope is mainly reflected in the following aspects
- Stable DC Power Supply: Hard chromium electroplating is an electrochemical process. The rectifier converts alternating current into fixed direct current to ensure the continuous and stable current during electroplating, which is crucial for the uniformity of the coating, thickness control, and deposition rate.
- Precise Voltage Control: The rectifier is equipped with a precision voltage regulation system to control the output voltage according to the electroplating process requirements; different voltages affect the deposition speed, grain structure, hardness, wear resistance, and corrosion resistance of the chromium coating. Adjusting the voltage can optimize the coating performance to match the workpiece.
- Periodic Reversing Function: Some hard chromium electroplating uses positive and negative reversing technology, and the rectifier can periodically switch between positive and reverse currents; it is beneficial to reduce the accumulation of hydrogen in the substrate, prevent hydrogen embrittlement, and ensure the mechanical properties of chromium-plated workpieces (such as high-strength steel parts); the rectifier with automatic reversing function switches according to the preset frequency and time to ensure quality and increase productivity.
- Pulse Power Application: Advanced rectifiers support pulse electroplating, superimposing pulse current on the basis of direct current; it can improve the microstructure of the chromium coating (refining grains, reducing porosity, enhancing bonding force, etc.), and increase hardness, wear resistance, and corrosion resistance; it also helps reduce energy consumption, lower the temperature rise of the plating solution, and suppress harmful side reactions.
- Integrated Control and Monitoring: Modern rectifiers integrate an intelligent control system to monitor parameters such as current, voltage, and temperature during electroplating in real time, and have functions such as overload protection and fault alarm; it helps operators adjust process conditions in a timely manner to ensure the stability and safety of electroplating, and is beneficial for the recording and tracing of process data to meet the requirements of the quality management system.
In hard chromium electroplating, the rectifier not only provides a basic DC power supply but also involves complex voltage control, periodic reversing, pulse electroplating technology, and advanced process monitoring and management, playing a key role in improving the quality, efficiency of the hard chromium coating, and the overall stability of the electroplating process.