Method A
For the organic solvents listed below. A cotton ball, saturated with the test chemical, was placed in a one ounce bottle (10mm x 75mm test tube or similar container). The container was inverted on the test material surface for a period of 24 hours. Temperature of test: 23° +/-2° C (73° +/-4° F).
Method B
For all chemicals listed below other than the organic solvents. Five drops (1/4cc) of the test chemical were placed on the test material surface. The chemical was covered with a watch glass (25mm) for a period of 24 hours. Temperature of test: 23° +/-2° C (73° +/-4° F).
Evaluation
After 24 hour exposure, exposed areas were washed with water, then a detergent solution and finally with isopropyl alcohol. Materials were then rinsed with distilled water and dried with a cloth. Samples are numerically rated as follows:
- No Effect - No detectable change in the material surface.
- Excellent - Slight detectable change in color or gloss but no change in function or life of the surface.
- Good - A clearly discernible change in color or gloss but no significant impairment of surface life or function.
- Fair - Objectionable change in appearance due to dis-coloration or etch, possibly resulting in deterioration of function over an extended period of time.
- Failure - Pitting, cratering or erosion of the surface. Obvious and significant deterioration.
| Inorganic Acids - Corrosive |
Black Onyx |
Gray |
Alpine White |
Forest Green |
Steel Blue |
| Chromic Acid (CrO3) - 40% | 2 | 2 | 2 | 1 | 3 |
| Hydrochloric Acid (HCl) - 10% | 1 | 1 | 1 | 1 | 1 |
| Hydrochloric Acid (HCl) - 37% | 1 | 1 | 1 | 1 | 1 |
| Nitric Acid (HNO3) - 40% | 1 | 1 | 1 | 1 | 1 |
| Nitric Acid (HNO3) - 70% | 2 | 2 | 2 | 2 | 2 |
| Sulfuric Acid (H2SO4) - 40% | 1 | 1 | 1 | 1 | 1 |
| Sulfuric Acid (H2SO4) - 96% | 5 | 5 | 5 | 5 | 5 |
| Organic Acids - Corrosive |
Black Onyx |
Gray |
Alpine White |
Forest Green |
Steel Blue |
| Acetic Acid (CH3CO2H) - 5% | 2 | 2 | 2 | 1 | 1 |
| Acetic Acid (CH3CO2H) - Glacial | 2 | 1 | 1 | 1 | 1 |
| Citric Acid (C6H8O7) - 1% Oleic | 1 | 1 | 1 | 1 | 1 |
| Acid (C18H34O2) - Phenol | 1 | 1 | 1 | 1 | 1 |
| Solution (C6H5OH) - 5% | 1 | 1 | 1 | 1 | 1 |
| Alkaline Solutions - Corrosive |
Black Onyx |
Gray |
Alpine White |
Forest Green |
Steel Blue |
| Ammonium Hydroxide (NH4OH) -10% | 1 | 1 | 1 | 1 | 1 |
| Potassium Hydroxide (KOH) - 15% | 1 | 1 | 1 | 1 | 1 |
| Sodium Carbonate (Na2CO3) - 20% | 1 | 1 | 1 | 1 | 1 |
| Sodium Hydroxide (NaOH) - 60% | 1 | 1 | 2 | 1 | 2 |
| Sodium Hypochlorite (NaOCl) - 4% | 1 | 1 | 1 | 1 | 1 |
| Organic Solvents |
Black Onyx |
Gray |
Alpine White |
Forest Green |
Steel Blue |
| Acetone (CH3COCH3) | 3 | 2 | 2 | 2 | 2 |
| Benzene (C6H6) | 2 | 2 | 2 | 2 | 2 |
| Carbon Tetrachloride (CCl4) | 1 | 1 | 1 | 1 | 1 |
| Diethyl Ether (CH3CH2OCH2CH3) | 1 | 1 | 1 | 1 | 1 |
| Dimethyl Formamide (HCON[CH3]2) | 1 | 1 | 1 | 1 | 1 |
| Ethyl Acetate (CH3CO2C2H5) | 2 | 2 | 2 | 2 | 2 |
| Ethyl Alcohol (CH3CH2OH) - 95% | 1 | 1 | 1 | 2 | 1 |
| Ethylene Dichloride (ClCH2CH2Cl) | 1 | 1 | 1 | 1 | 1 |
| Heptane (CH3[CH2]5CH3) | 1 | 1 | 1 | 1 | 1 |
| Isooctane (C8H18) | 1 | 1 | 1 | 1 | 1 |
| Kerosene | 1 | 1 | 2 | 1 | 1 |
| Methyl Alcohol (CH3OH) | 1 | 1 | 1 | 1 | 1 |
| Sodium Hypochlorite (NaOCl) - 4% | 1 | 1 | 1 | 1 | 1 |
| Organic Compounds |
Black Onyx |
Gray |
Alpine White |
Forest Green |
Steel Blue |
| Aniline (C6H5NH2) | 2 | 1 | 1 | 2 | 1 |
| Mineral Oil | 1 | 1 | 1 | 1 | 1 |
| Olive Oil | 1 | 1 | 1 | 1 | 1 |
| Soap Solution - 1% | 1 | 1 | 1 | 1 | 1 |
| Transformer Oil | 1 | 1 | 1 | 1 | 1 |
| Turpentine | 2 | 1 | 1 | 1 | 2 |
