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HMG Knowledge Base
Superthane Resistance
The chemical and solvent resistance of Superthane films has been tested on the following build-up applied to sandblasted iron bolts.
- 1 coat of HMG 2 pack Yellow Etch Primer
- 1 coat of HMG Polykote Primer
- 2 coats of HMG Superthane
The individual coats were applied at 24 hour intervals. To eliminate as far as possible any influence on the chemical resistance of the system through solvent retention, testing was started only after 3 months of storage at room temperature.
The symbol “>” (= larger than) means that after the immersion time of the specimen listed behind the symbol there still has been no change or further change of the finish.
The result list in the column “incipient surface change” refers to the first changes in the surface of the film becoming visible, e.g. Isolated microscopically fine blisters, slight softening of film surface, etc.
| Incipient Surface Change | Nature Of Change |
No More Protection |
|
| Tap water | 13 months | Small blisters | >20 months |
| Distilled water | 13 months | Small blisters | >20 months |
| Sea water | 13 months | Small blisters | >20 months |
| Hydrochloric acid 5% | 15 months | Small blisters | >20 months |
| Hydrochloric acid 10% | 6 months | Small blisters | >20 months |
| Acetone | >3 months | Softening | >20 months |
| Methyl ethyl ketone | >15 months | Softening | >20 months |
| Methyl isobutyl ketone | >20 months | |
|
| Cyclohexanone | >20 months | |
|
| Diacetone alcohol | >20 months | |
|
| Formaldehyde 40% | >16 months | Gloss reduction | >20 months |
| Dimethyl formamide | 3 months | Softening | >20 months |
| Methylene chloride | 3 days | Blisters | 3 days |
| Chloroform | 3 days | Blisters | 3 days |
| Carbon tetrachloride | >20 months | |
|
| Dichloroethane | 0.5 months | 0.5 months |
|
| Dichloropropane | >10 months | |
|
| Trichloroethane | >10 months | |
|
| Perchloroethane | >10 months | |
|
| Chlorinated benzene | >18 months | |
|
| Clophen A 30 | >20 months | |
|
| Clophen A 60 | >20 months | |
|
| Caprolactam 100% | >20 months | |
|
| Caprolactam 50% | >20 months | |
|
| Caprolactam 30% | >20 months | |
|
| Caprolactam 20% | >20 months | |
|
| Tartar 5% | >16 months | Small blisters | >20 months |
| Skydrol A 500 | >20 months | |
|
| Trikresyl phosphate | >20 months | |
|
| Wash liquor 3% | 12 months | Small blisters | >20 months |
| Dish washer detergent 3% | 12 months | Small blisters | >20 months |
| Vehicle cleaner (acid) 100% | 6 months | Small blisters | >20 months |
| Vehicle cleaner (acid) 10% | >9 months | Small blisters | >20 months |
| Jet fuel | >6 months | |
|
| Electrophoresis lacquer | >5 months | |
|
| Sulphuric acid 5% | 15 months | Small blisters | >20 months |
| Sulphuric acid 10% | 15 months | Small blisters | >20 months |
| Sulphuric acid 20% | 15 months | Small blisters | >20 months |
| Sulphuric acid 30% | 1 month | Small blisters | >2 months |
| Sulphuric acid 50% | 1 month | Small blisters | >2 months |
| Nitric acid 5% | 13 months | Small blisters | >2 months |
| Nitric acid 10% | 6 months | Small blisters | >13 months |
| Phosphoric acid 5% | 15 months | Small blisters | >20 months |
| Phosphoric acid 50% | >9 months | Small blisters | |
| Boric acid 10% | 15 months | Small blisters | >20 months |
| Caustic soda solution 5% | 9 months | Gloss reduction | >20 months |
| Caustic soda solution 10% | 9 months | Gloss reduction | >20 months |
| Caustic soda solution 20% | 9 months | Gloss reduction | >20 months |
| Caustic soda solution 30% | 9 months | Gloss reduction | >20 months |
| Caustic soda solution 40% | 9 months | Gloss reduction | >20 months |
| Caustic potash solution 5% | 9 months | Gloss reduction | >20 months |
| Caustic potash solution 10% | 9 months | Gloss reduction | >20 months |
| Caustic potash solution 20% | 9 months | Gloss reduction | >20 months |
| Ammonia 5% | 0.5 months | Blisters | 2 months |
| Ammonia 10% | 0.5 months | Blisters | 1 month |
| Ammonia 20% | 3 days | Blisters | 0.5 months |
| Hydrazine hydrate | 7 days | Blisters & softening | 7 days |
| Soda solution 5% | >20 months | |
|
| Soda solution 10% | >20 months | |
|
| Sodium bicarbonate 10% | >20 months | |
|
| Common salt solution 5% | >20 months | |
|
| Common salt solution 10% | >20 months | |
|
| Ammonium chloride 30% | >20 months | |
|
| Chloride of lime solution 1% | >8 months | |
|
| Formic acid 5% | 1 month | Blisters | 2 months |
| Formic acid 10% | 1 month | Blisters | 2 months |
| Acetic acid 5% | 5 months | Blisters | 6 months |
| Acetic acid 10% | 2 months | Blisters | 2 months |
| Oxalic acid 10% | >20 months | Blisters | |
| Citric acid 10% | >20 months | |
|
| Lactic acid 5% | >20 months | |
|
| Lactic acid concentrate | 18 months | Small blisters | >20 months |
| Tartaric acid 5% | >20 months | |
|
| Oleic acid | >20 months | |
|
| Linseed fatty acid | >20 months | |
|
| Succinic acid 10% | 13 months | Small blisters | >20 months |
| Coconut fatty acid | >20 months | |
|
| Maleic acid 10% | >20 months | |
|
| Petroleum spirit | >20 months | |
|
| White spirit | >20 months | |
|
| Benzene | >20 months | |
|
| Toluene | >20 months | |
|
| Xylene | >20 months | |
|
| Methanol | 5 months | Softening | >20 months |
| Ethanol 100% | 15 months | Softening | >20 months |
| Ethanol 70% | 18 months | Softening | >20 months |
| Ethanol 40% | >20 months | |
|
| Ethanol 15% | >20 months | |
|
| i-propanol | >20 months | |
|
| n-butanol | >20 months | |
|
| Cyclohexanone | >20 months | |
|
| Benzyl alcohol | 0.5 months | Softening | >20 months |
| Ethylene glycol | >20 months | |
|
| Glycerine | >20 months | |
|
| Ethyl acetate | >20 months | |
|
| Butyl acetate | >20 months | |
|
| Metyglycol acetate | >20 months | |
|
| Ethylglycol acetate | >6 months | |
|
| Methyl acrylate | >6 months | |