Water-soluble zinc plating sealer which is good? Try this zinc plating sealer
Jul 10,2020
When the galvanized workpiece is sealed after passivation, it is found that there is white powder precipitation on the surface of the sealing layer of the workpiece. The customer does not accept this appearance? Try this galvanizing sealant of Dazhi Chemical.
Features
1.DZ-301TMT is a water-soluble galvanized sealant, suitable for sealing after all galvanized passivation, suitable for hanging plating and barrel plating parts. It has good adhesion and is not easy to produce flow marks.
2.DZ-301TMT galvanizing sealant is combined with DZ-980LC trivalent chromium color blunt agent, which shows white appearance, but neutral salt spray can reach the standard for more than 100 hours.
Proposed production process
Pretreatment → zinc-nickel alloy/zinc-cobalt alloy/zinc-iron/zinc-zinc electroplating → two water washes → acid activation → two water washes → trivalent chromium passivation → two water washes → sealing agent 301TMT → rotary drying of the workpiece (rotation speed: 200-400 r/min minutes, rotation time: 5-30 seconds) → drying (60-80 ℃,10-30 minutes)
Maintenance of sealant
1. During production, supplement shall be made according to the pH value or the amount taken out. When the pH value is lower than 7.0, adjust it to the normal range with ammonia water or 20% sodium hydroxide. During production, avoid mixing acid or precipitation will occur.;
2. If the closed parts need further processing (such as adhesive treatment), the concentration of sealing agent shall be about 2% for heating treatment;
3. Sealing agent concentration is high, the film color is light, high corrosion resistance. Sealant concentration is low, can maintain the original color of the film, but the corrosion resistance is low.
4. Pay attention to the substitution of metal ions (such as zinc or chromium). If the total metal ion content is higher than 250 mg/L, it will increase the chance of sagging and reduce the corrosion resistance. Therefore, it is necessary to ensure that the workpiece enters the closed tank.
Disclaimer: The information and suggestions in this note on the various production processes and products of our company are based on our own experiments and research, and have also been tested by production to a certain extent. Users should decide whether to adopt the company's processes and products according to their own tests. We are not responsible for any adverse consequences. However, we are happy and will do our best to help users and solve problems encountered in production.
Contact Us
E-mail:
sales@dazhichem.com
Phone/WeChat:
+86-18520125168
Address:
No.1 Tianyuan East Road, Yonghe Economic Zone, Huangpu District, Guangzhou City
CONTACT US
Guangdong Dazhi Chemical Technology Co., Ltd
Email: sales@dazhichem.com
Phone/WeChat: 86-18520125168
Address: No.1 Tianyuan East Road, Yonghe Economic Zone, Huangpu District, Guangzhou City
