（1）Introduction
This product forms a homogeneous, nonmetallic coating provide a clean surface and corrosion resistant polymer coating to sheet steel. The product increases adhesion between the sheet and the paint system. It improves corrosion resistance of the paint system. It is especially suitable for pretreatment of colored sheet. Sheet previously coated with primer need not be rinsed and can be painted directly. The performance of these products is set out below:
|
Primer |
Dilution for use |
T-bend
Test
|
Reverse-strike
Test
|
MEK
(Times)
|
SST 72h |
|
GD-C101 |
1：10 |
≤ 2T |
≥ 9J |
≥100 |
D7grade |
|
GD-C101 |
1：15 |
≤ 2T |
≥9J |
≥100 |
D5grade |
|
Foreign1 |
1：10 |
≤ 2T |
≥9J |
≥100 |
E2grade |
|
Foreign2 |
1：10 |
≤ 2T |
≥9J |
≥100 |
E4grade |
|
Foreign3 |
1：10 |
≤ 3T |
≥7J |
≥100 |
E2grade |
（2）Application
This product is best applied at 1:10（by weight) dilution at between 10～25℃ by roll coating. After treatment the strip should be dried through an oven at 45℃。
（3）Product range
Our primer is supplied as a range of products with varying adhesion strengths between the product and the steel and a range of corrosion resistances.
The products are GD-C101, GD-C102 and GD-C103.
Customers should select the most appropriate product for their conditions.
（4）Precaution
The product must not be allowed to cool bellow 0℃ . Use of distilled water is recommended for dilution ready for use.
（5）Working procedure
The flow diagram below represents normal practice：
