Multi-Level Speed Regulation Electroplating Passivation Production Line

Equipment Description:

1. Process flow
1. Pre-treatment of passivation
The workpiece is pre-treated by degreasing → pickling → washing → activation to remove surface oil and oxide layer and improve the adhesion of passivation layer.
2. Passivation treatment
A dense oxide film (such as chromate film generated by zinc passivation) is formed in the passivation tank through chemical or electrolytic process to enhance corrosion resistance.
Some processes use vibration or air blowing devices to accelerate the passivation reaction and shorten the processing time.
3. Post-treatment and quality inspection
After passivation, it is washed with pure water → dried → cooled, and the film thickness (COV≤5%) and adhesion (grid test) are tested to ensure compliance with the standards.

2. Core control technology
PLC automation control: Mitsubishi/Omron PLC programming is used, supporting full-automatic/semi-automatic mode switching, and passivation time (such as 25 minutes/cycle), temperature (normal temperature to 80℃) and liquid level parameters can be preset.
‌Human-machine interaction interface‌: The touch screen monitors the pH value of the passivation solution, current density and equipment operating status in real time, and supports fault alarm and data tracing.
‌Multi-level speed regulation‌: The variable frequency motor drives the conveying system to adapt to different workpiece sizes and process rhythm requirements.

3. ‌Application scenarios‌ ‌

Hardware workpieces‌: such as fasteners, zinc passivation of roller-plated parts (trivalent chromium/chromium-free process).
‌Precision electronic components‌: passivation and anti-oxidation treatment of semiconductor substrates and copper pillars.
‌Large-size metal structural parts‌: functional passivation coatings for industrial equipment and automotive parts.

4. ‌Technical parameter examples

Main structures and components:

1. Main frame and lifting system
1. Gantry frame
It adopts a high-rigidity column-type door structure, usually made of stainless steel or PP/PVC, with strong corrosion resistance, and can be adapted to passivation tanks and workpieces of different sizes.
There are crane tracks on both sides of the plating tank to facilitate driving and corrosion protection. Some models are equipped with double-layer pedestrian platforms for easy maintenance.
2. Lifting device
It includes an electric lifting hook and a gantry crane, which is driven by gear racks or polyurethane rollers, with a positioning accuracy of ±1mm and supports handheld remote control operation.
It comes with a drainage function to reduce the amount of passivation liquid carried out and reduce the risk of cross contamination.

2. Passivation treatment module
1. Passivation tank
It adopts PP/PVC material tank, with built-in spray system, air stirring device and constant temperature control system (temperature accuracy ±2℃) to ensure uniform distribution of passivation liquid and reaction efficiency.
Some models support vibration and aeration functions to accelerate the formation of passivation film. ‌2. Pretreatment tank group‌
Includes degreasing tank, pickling tank, water washing tank, etc., which are used to remove oil and oxide layer on the surface of the workpiece and improve the adhesion of the passivation layer.
‌3. Post-processing unit‌
Configure pure water washing tank, drying tank and cooling area to complete the cleaning and drying of the workpiece after passivation.

3. ‌Auxiliary system‌
‌1. Filtration and circulation system‌
Equipped with high-precision filter (such as 5μm level), continuously remove impurities in the passivation liquid to ensure the uniformity of the film layer.
The plating liquid circulation pump maintains the flow of the passivation liquid to prevent precipitation accumulation.
‌2. Environmental protection device‌
The closed tank body is combined with the VOC waste gas recovery system to reduce acid mist and harmful gas emissions, and meet environmental protection standards (VOC emissions ≤50mg/m³).
‌3. Control system‌
The core adopts PLC programmable controller (such as Mitsubishi and Omron brands), and the passivation time, temperature and process parameters are set through the touch screen, supporting multi-program switching and data traceability.
Integrated fault alarm module to monitor key indicators such as current and pH value in real time.

4. Core process components

Rectifier power supply: dual pulse or DC power supply, stable output current, suitable for passivation process requirements such as galvanizing and nickel plating.

Roller assembly (roller plating machine): PP/PVC drilled roller with adjustable speed to ensure that the workpiece rolls evenly in contact with the passivation liquid.

Features:

1.High cost performance: Based on the customer's product positioning and development strategy, and with economic affordability as the foundation, we achieve the best cost performance.
2.The advanced and meticulous design concept of the equipment, along with the highly automated industrial equipment, showcases the image of a modern and advanced enterprise.
3. It has high adaptability, meeting the current production requirements and reserving room for development, taking into account the needs of increased production and improved quality in the future.
4.Quality compliance strictly adheres to the ISO900 quality management system, with every minute detail of the entire equipment installation being strictly controlled.