QUALITY STANDARDS:-
DANA STEEL has a modern in-house laboratory to conduct all necessary mechanical and Paint Tests such as:
| TEST | ASTM STANDARD |
| COLOR | D2244 – 16 |
| SALT SPRAY | B117 – 18 |
| PENCIL HARDNESS | D3363 – 05(2011)e2 |
| T-BEND | D4145 – 10(2018) |
| DRY FILM THICKNESS | D5796 – 10(2015) |
| CROSS HATCH ADHESION | D3359 – 17 |
| SOLVENT RESISTANCE | D5402 – 19 |
| SPECULAR GLOSS | D523 – 14(2018) |
| MANDREL BEND TEST | D522 -17 |
| CHALK RESISTANCE | D4214 – 07(2015) |
Differences between RMP and PVDF Paints
| Rmp | PVDF | ||
| General Information | Resin System | Polyester & Melamine | Polyvinylidene Fluoride & Acrylic |
| Film Formation | Cross linking | Fusion | |
| Peak Metal Temperature | 224-2350C | 249-2540C | |
|
Physical Properties |
Primer & Coating Thickness | Polyurethane / Polyester Primer at
4-6 microns |
Polyurethane Primer at
5-7microns |
| Topcoat & Coating thickness |
18-20 |
20-22 |
|
|
MEK DOUBLE RUB |
100 D/R Pass |
100 D/R Pass |
|
|
T-BEND |
2-3T |
0-1T |
|
|
REVERSE IMPACT |
13J (No paint Removal) |
13J (No paint Removal) |
|
| Cross-Hatch adhesion | No paint removal | No paint Removal | |
|
PENCIL HARDNESS |
Fmin |
Bmin |
|
| Water boil adhesion | Pass | Pass | |
| Accelerated Weathering test Performance |
Humidity Resistance (HDG) |
No blistering, Peeling, Cracking, loss of gloss or softening of the finish after 1000hrs of exposure to 100% Humidity at 100+/-50F. | No blistering, Peeling, Cracking, loss of gloss or softening of the finish up to2000hrs of exposure to 100% Humidity at 100+/-50F. |
| QUV | QUV-A
UV cycle – 4hrs at 750C Condensation – 4 hrs at 500C Colour change is not more than 5 NBS unit as per ASTM D 2244-89 no chalking greater than #2 rating as per AS1580-481-11, Gloss retention is not greater than # 3 rating as per AS1580-481-5 No blistering and adhesion loss after 1000 UV hrs exposure. Note: performance is based on colour, pigmentation chemistry dependant |
QUV-B
UV cycle – 4hrs at 500C Condensation – 4 hrs at 400C Colour change is not more than 5 NBS unit as per ASTM D 2244-89 no chalking greater than #2 rating as per AS1580-481-11, Gloss retention is not greater than # 3 rating as per AS1580-481-5 No blistering and adhesion loss after 1000 UV hrs exposure. Note: performance is based on colour, pigmentation chemistry dependant |
|
|
Salt Spray resistance (HDG) |
Sample subjected to 5% neutral salt solution spray exhibit no blistering after 1000 hrs of exposure. | Sample subjected to 5% neutral salt solution spray exhibit no blistering after 2000 hrs of exposure. | |
| Chemical Resistance | 30 minutes exposure to 10% HCL solution (spot test) | No colour change and no blisters | No colour change and no blisters |
| 30 minutes exposure to 5% NaOH solution. | No colour change and no blisters | No colour change and no blisters | |
| Film Integrity | 10 YEARS | 20 YEARS | |
| Chalk retention ASTM D4214 Method A | Rating >2 | Rating>4 |
