Brown Oxide Activator for PCB Wet Process
Brown Oxide Activator: 0.97-1.03 g/mL
Storage conditions: 5℃-40℃, avoid heat and direct sunlight
Brown Oxide Activator
An important step in the Brown Oxide process of the browning activation chemical. This step is before the brown oxide treatment. After alkaline cleaning and water washing, the production board enters the activation solution for activation treatment, and then directly enters the brown oxide tank. This step ensures uniform coverage of the organic metal film in the subsequent brown oxide treatment.
1) Product Feature
1. It is an important step in the Brown process;
2. The electrochemical potential of the copper surface is balanced to ensure the stable and uniform bite rate during the browning treatment;
3. Avoid the pollution brought by the potion through the surface of the board, and protect the working fluid of the browning tank
2) Equipment Requirement & Recommendation
| Item | Requirement & Recommendation |
| Tank design | Horizontal transmission, tank-in-tank immersion design |
| Tank material | Polyvinyl chloride, polypropylene, titanium, or stainless steel |
| Solution stirring method | Use waterjet |
| Metal parts | SS316 stainless steel |
| Heating materials | Quartz, titanium, PTFE, or stainless steel |
| Filtering system | 10 micron filter element, the filter element is used after alkaline acid cleaning |
| Exhaust system | Polyethylene, polypropylene, or polyvinyl chloride |
3) Composition of Bath
The parameters of the brown oxide activator are as follows:
Mode 1: Immersion Tank (recommended)
| Tank Liquid Components (prepared by 100 liters) | Concentration (liter, volume ratio) | Weight (kg, weight ratio) | Specific gravity (g/ml) |
| Deionized water | 98.0 | 98.0 | 1.0 |
| Brown oxide activator | 2.0 | 2.0 | 1.0 |
Mode 2: Spray Tank
| Tank Liquid Components (prepared by 100 liters) | Concentration (liter, volume ratio) | Weight (kg, weight ratio) | Specific gravity (g/ml) |
| Deionized water | 96.0 | 96.0 | 1.0 |
| Brown oxide activator | 4.0 | 4.0 | 1.0 |
Slot Matching Steps:
①Clean the tank;
②According to the specific tank volume, calculate the required addition amount of each component according to the parameters in the above table;
③Add about half of the tank volume of deionized water;
④Add the brown oxide activator according to the calculated amount and stir well;
⑤Replenish water to the corresponding tank volume scale;
⑥Heat to the set temperature and prepare for production.
4）Operating Parameters
The operating control parameters of the brown oxide activation solution are as follows:
| Operating Parameters | Operating Range | Best Value |
| Temperature (immersion mode) (℃) Temperature (spray mode) (℃) |
25–40 35–45 |
35 40 |
| Contact time (seconds) | 10-30 | 15 |
| pH value | 6-10 | 8 |
5) Process Control & Maintenance
①Add parameters:
The adding parameters of the brown oxide activator are recommended as follows:
| Adding components to bath | Adding amount (ml /m2) (cutting board area) |
| Browning activator |
3-7 |
| Deionized water | Add to liquid level |
The bath life is 40-60 m²/L (cutting board area)
②Maintenance: It needs cleaning and maintenance every time the tank is renewed
6) Product Characteristic & Storage Condition
①Brown Oxide Activator: 0.97-1.03 g/mL
②Storage conditions: 5℃-40℃, avoid heat and direct sunlight
7) Safety Guidelines
①Avoid direct contact with this chemical.
②Do not breathe its vapor.
③Wash contaminated clothing before reuse.
④Before using or coming into contact with this chemical, please read the relevant Material Safety Data Sheet (MSDS) carefully. Please ask for relevant information from the relevant customer service staff
