Car shock absorber black electrophoresis paint by Low temperature
curing
Product Introduction :
OHT-825/OHT-825 Ultra Low temperature Black Cationic Epoxy
Electrocoat, is HLS Paint (Shanghai) Co., Ltd. the ninth generation
of independent research and development of electrophoretic coating.
The lead, cadmium, chromium, mercury and other heavy metals,
two-component aqueous dispersion resin. At the same time, inherited
the characteristics of several generations of product quality,
OHT-825 on galvanized steel sheet has good adaptability, almost at
the bottom of all the metal material coating, such as: cold rolled
steel, galvanized steel, aluminum, stainless steel plate, rubber
parts, zinc and aluminum alloy plate, such as applicable.
This product features shown below:
High penetration and good uniformity of internal and external.
Excellent leveling and coating, coating, coating binding force and
supporting good
Particularly suitable for high temperature baking of the workpiece,
in particular, rubber and metal binding parts and zinc aluminum
alloy material.
Main ingredients:
Neutralizing agent: organic acid
Solvent: alcohol ether
Product quality data
| Project | Technical data | Test standard |
Resin
(OHT-825) | Black Paste (OHT-825) |
| Appearance | —— | Milky white liquid | Black viscous liquid,no agglomeration | Visual |
| pH | 25℃ | 6.0±1.0 | —— | GB/T 9724 |
| Conductivity | 25℃, μs/cm | 1400±500 | —— | HG/T 3334 |
| Storage stability |
No stratified state, and there were no obvious difference compared
to before storage | In 5-35 ℃ temperature 1 year |
Note: pH, conductivity measurement in the resin/pure water = 1:1
dilution
Coating conditions
Experimental panel: phosphated cold-rolled steel plate
Tank temperature: 28-35℃
Pole ratio: A/C = 1/2 ~ 1/4
Distance of electrodes: 15cm
ED time: For full immersing 1-3 minutes ( 20 seconds soft start)
Baking conditions: (130-140)℃×(20-30)min (Keeping temperature of parts coated)
Bath on site management project
Good bath data and coating quality, from the strict parameters
management and maintenance of equipment, production line according
to its own reality time situation, can have different management
project and specifications, recommend the construction parameters
see the table below for reference:
| Classification | Project | Control Data | Testing frequency |
| New bath | Anolyte |
| Electrophoresis tank | Ratio | 1:(4-5) | -- | |
| Ripening time | 24-48 | -- | |
| Solid ( 120 ℃ /1h ,% ) | 10-20 | -- | once a day |
| PH | 5.1-5.8 | 2.0-3.5 | once a day |
| Conductivity ( μs/cm ) | 1200±400 | 1500±700 | once a day |
| P/B | 0.1-0.20 | once a week |
| L panel | Smooth horizontal plane and vertical plane without obvious
differences | once a week |
| Solvent content (%) | 2.0-4.5 | once a week |
| Liquid level Fall head (cm ) | 10-15 | once a day |
| ED voltage( V ) | 0-280 | once a day |
| Break voltage ( V ) | 350 | once a week |
| Bath temperature ( ℃ ) | 28-35 | once a day |
| ED time( S ) | 60~180 | once a day |
| UF － 1 Tank | Solid content (%) | ≤2.0 | once a day |
| UF － 2 Tank | Solid content (%) | ≤0.8 | once a day |
| Baking furnace | Provisions furnace temperature( ℃ ) | 135-145 | once a day |
| Curing conditions | Drying temperature |
(130-140) ×(20-30)min (With content holding time) | once a day |
Storage, packaging and transportation
This product is a water-borne industrial coatings, non-hazardous,
non-inflammable and explosive products; transportation to prevent
direct sunlight, avoid freezing (>5℃ ); Packaging for 50/60/200L
Plastic barrel; in the transport and storage of drums should be
maintained clean, avoid charging the dirt brought in on drums
during filling tank, again checked and confirmed that the quality
of products, including paste resin, emulsions and additives should
be indoor storage, good ventilation, dry, protect against freezing
and overheating, the storage temperature should be controlled at
5～35℃, products from the date of production, over shelf,
experimentation is required to determine whether can continue to
use.
