CORROCOAT
Graphite ‘S’
Product reference: 3/12
Product title: Graphite ‘S’
Valid from: 10th January 2000
Last reviewed: May 2019
Type: An electrically conductive two pack cold cured acrylated ester system loaded with flaked graphite.
Suggested use
Used in immersed environments for protection in base solutions or solutions aggressive to glass such as Hydrofluoric Acid. The product is a good microwave absorber and has good self-lubrication properties both wet and dry.Useful as a first coat on concrete to enable spark testing and as a conductor layer for preventing static build up. It can be used as a surface veil to other Corrocoat products.
Limitations
Limited abrasion and erosion resistance.
Health & safety
Before handling or using this product, the material safety data sheet should be read and, all precautions observed.
Surface preparation
The surface to be coated should be free from grease etc. Metal: should be grit-blasted to a minimum SSPC-SP10 (ISO 8501-1 SA 2½ near 3) or equivalent. (Refer to Corrocoat Data Sheet SP1).Concrete: should be pre-primed. For full Surface Preparation details see relevant Surface Preparation Specification Sheets.
Recommended DFT
1.0 to 3.0mm in multiple coats. 20 mils (500 microns) when applied under or over other Corrocoat products.
Pot life
Varies with temperaturebut approximately50 minutes at 68°F
(20°C). Pot life extender (retarder)available, refer Corrocoat
TSD.
Practical spreading rate
42 sf per gal at 30 mils (1.05m2
/litre at 750 microns).
NOTE: This information is given in good faith, but rate
may vary significantly dependent upon environmental
conditions, the geometry and nature of work undertaken
and the skill and care of application. Corrocoat accepts
no responsibility for any deviation from these values
Specific gravity
0.04lbs/cubic inch (1.24 gms/cc).
Pot life
Approximately 1 hour 10 minutes at 68°F (20°C). Pot life will decrease at higher temperatures and increase at lower temperatures. Seek the advice of Corrocoat USA for availability of inhibitor.
Elongation at break
Atmospheric conditions 1.3%.
Tensile strength
3900psi (274 kg/cm²) dependent upon cure state.
Temperature limits
230°F (110°C) immersed. 346°F (175°C) non-immersed. No lower limit.
Abrasion resistance
255mg. Loss 1000 cycles/1000 gm load H18 wheel.
Mixing ratio
98:2 base to catalyst.
Hardness
32 Barcol (approximate)
Thermal conductivity
3.98 W/m°K
Cleaning fluid
Acetone or Methyl Ethyl Ketone before gel.
Mixing ratio
98:2 parts base to hardener. For mixing instructions use the Polyglass Application Data Sheet. This product behaves in a similar manner, but the addition of inhibitor should only be made after first checking the suitability with CorrocoatUSA.
Application equipment
45:1 ratio airless pump fitted with 10mm nylon lined hoses. Spray gun should be fitted with a clean by reversing tip in therange 40 to 60 thou. As a guide, a typical tip size would be 47 thou with a 60°fan pattern. The size of tip and fan pattern will vary dependent upon the nature of the work. May also be applied by brush.
Application
When used on its own, Graphite S should be applied in at least two layers to a minimum DFT of 40 mils (1000 microns). Each coat should be applied to a WFT between 24-40 mils (600-1000 microns) by multi pass wet on wet spray technique. When used as a surface veil forCorroglass materials it should also be applied in two coats to a DFT of 20 mils (500 microns) with the Corroglass/Graphite combination being not less than 40 mils (1000 microns) in total. Do not add dye to this product.
Thinners
DO NOT THIN.The addition of Styrene may substantially affect the chemical resistance of this product, particularly where post curing is not carried out.
Packaging
1 Gallon and 5 Gallon Kits.
Storage life
6 months stored at temperatures below 68°F (20°C) and away from heat sources and direct sunlight. Frequenttemperature cycling will shorten storage life. See other information for extension of shelf life.
Color availability
Black only.
Theoretical spreading rate
40 sf per gal (1 m²/litre) @ 1mm
Volume solids
This material contains volatile liquid convertible to solids. Volume solids obtained will vary dependent uponpolymerization conditions. Nominally 99.3% of the contents are convertible to solid.
Flash point
82°F (28°C).
Catalyst type
Methyl Ethyl Ketone Peroxide Corrocoat Type P2.
Overcoating
May take place as soon as previous coat has gelled sufficiently to resist movement of next application and while still tacky. Maximum over-coating without treatment: 72 hours: Shorter at ambient temperatures above 86°F (30°C). Once the maximum overcoating time has been reached, adhesion values attained by any subsequent coat will reduce dramatically. It is important to observe maximum overcoating times and note these will vary with climatic conditions. Any further application of coating at this juncture should be treated as a repair, with the surface flash blasted to provide a physical key.
Curing time
At 68°F (20°C), 90% cure will be attained within 8 hours. Full cure for chemical resistance will be 6 days. Cure time may be shortened and a beneficial increase in final cure may be attained by heat treatment. ConsultCorrocoat USA for specific information.Although not fully cured, after gel has occurred, this product may be immersed in some environments without detriment to the coating.
Cleaning solvent
Methyl Ethyl Ketone, Methyl Iso Butyl Ketone – before gel.
Elongation
0.9%.