7.2 Product Requirements
7.2.1 Lead
All coating materials used on Caltrans equipment shall be lead-free, less than 300 parts per million (less than 0.03%) by mass of lead in the dried/cured finished coating.
7.2.2 Hexavalent Chromium & Cadmium
All coating materials used on Caltrans equipment shall not contain hexavalent chromium or cadmium.
7.2.3 Durability Test Ratings Required for Liquid Coatings
|
Test |
Standard |
Minimum Criteria |
|
Film Hardness by Pencil Test |
ASTM D-3363 |
2H |
|
Resistance of Organic Coatings to the Effects of Rapid Deformation (Impact) |
ASTM D-2794 |
50 inch-pounds |
|
Chip Resistance of Surface Coatings |
SAE J-400 or ASTM 3170 equivalent |
6B, topcoat and undercoat |
|
ASTM D3363, Pencil Hardness Scale |
|
6B - 5B - 4B - 3B - 2B - B - HB - F - H - 2H - 3H - 4H - 5H - 6H |
|
Softer Harder |
SAE J400 Chip Ratings
Number Categories for Chip Ratings
| Rating Number | Number of Chips |
|---|---|
| 10 | 0 |
| 9 | 1 |
| 8 | 2-4 |
| 7 | 5-9 |
| 6 | 10-24 |
| 5 | 25-49 |
| 4 | 50-74 |
| 3 | 75-99 |
| 2 | 100-149 |
| 1 | 150-250 |
| 0 | >250 |
Size Categories for Chip Ratings
| Rating Letter | Chip Sizes |
|---|---|
| A | < 1 mm (approx. 0.03 in) |
| B | 1-3 mm (approx. 0.03-0.12 in) |
| C | 3-6 mm (approx. 0.12 - 0.25 in) |
| D | >6 mm (approx. 0.25 in) |
7.2.4 Durability Test Ratings Required for Powder Coatings
|
Test |
Standard |
Minimum Criteria |
|
Film Hardness by Pencil Test |
ASTM D-3363 |
2H |
| Mandrel Bend Test of Attached Organic Coatings | ASTM D-522 | 1/8 inch |
|
Resistance of Organic Coatings to the Effects of Rapid Deformation (Impact) |
ASTM D-2794 |
80 inch-pounds |
|
Salt Spray |
ASTM B-117 |
1000 hrs. Pass < 1/8” Scribe Creep |
| Water Resistance of Coatings in 100 % Relative Humidity | ASTM D-2247 | 1000 hrs. Pass < 1/8” Scribe Creep |