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