Corroglass 252 (Drillguard)
Product reference: 1/03
Product title: Corroglass252 (Drillguard)
Valid from: 18th March 1998
Last reviewed: 31 May 2019
Type: A light duty bisphenol ‘A’ polyester coating, cured by the addition of organic peroxide.
As a light duty coating for atmospheric conditions or as a top coat/surface veil for heavy duty grades.
Light duty or as surface veil coating only.
Health & safety
Before handling or using this product, the safety data sheet should be read and all precautions observed.
When used direct on to substrate, this should be on correctly prepared surfaces that should be free of contaminants and grit blasted to SSPC-SP10 (ISO Standard 8501-1 Sa 2½) or equivalent, with a surface profile of at least 2 mils (50 microns). All blast residues should be removed by sweeping clean with dry oil- free compressed air and vacuum cleaning where necessary. Apply coating to substrate as soon as possible and before blast standard deteriorates. For full surface preparation see relevant Surface PreparationSpecification Sheets.
Brush, Roller or Spray.
Apply as a surface veil in a single coat of approximately 8 mils (200 microns). When used direct to substrate, usemultiple coatsas required to achieve a minimum DFT of 20 mils (500 microns). When applying, each subsequent coat of materialshould be of a different color to the previous one to ensure full and even coverage. Only the recommended dye for the product should be used. Dyes can affect chemical and corrosion resistance in some environments and the advice of Corrocoat USA should be sought where the material will work close to either its chemical resistance or temperature limit. In some environments, dyes are not color stable and a change in color may take place in service that is not detrimental to coating performance.
25 to 30 minutes at 68°F (20°C). Pot life will be shorter at higher temperatures and longer at lower temperatures. Where temperatures are below 50°F (10°C) the use of catalyst P4 will reduce pot life and cure time. Where higher temperatures are encountered, refrigerate materialbefore use or seek the advice of Corrocoat USA foravailability of inhibitor or material with longer pot life.
This material can be thinned by the addition of not more than 5 parts of Styrene Monomer to 100 parts base before catalyzation.NO OTHER DILUTENT OR THINNER SHOULD BE USED. THE USE OF ACETONE OR SIMILAR THINNERS IN CORROGLASS WILL SEVERELY AFFECT PRODUCT PERFORMANCE.
1 Gallon and 5 Gallon Kits.
12 months stored at temperatures below 68°F (20°C) and away from radiating heat sources or direct sunlight(see Shelf Life Information Sheet).
Pigmented White. Dyes can be used to effect color change.
0.5 to 1.0 mm in multiple coats or as advised
Theoretical spreading rate
32 sf per gallon at 40 mils dft
194°F (90°C) immersed. No known lower limit. 320°F (160°C) non-immersed.
May take place as soon as previous coat has gelled sufficiently to resist movement of next application and while still tacky. Maximum overcoating without treatment 4 days. Shorter at ambient temperatures above 86°F (30°C).
Acetone or Methyl Ethyl Ketone before gel. Trichloroethane after gel
Use carbide tool or tip with good radius and neutral rake. Material has similar machining characteristics to those of grey cast iron. Tool must be kept sharp. Run out will occur due to tool wear over relatively short distances. Clean water may be used as a coating lubricant or dust suppressant.
Corroglass 252 can be catalyzed within the ratios of 100:1 parts base to catalyst by weight to 100:3 parts base to catalyst by weight. The ratio should always be within these limits, 2% addition of catalyst being the norm with a reduction being made for high ambient temperatures.
Weigh out only the proportion of material that can be used within the pot life and place into a suitable mixing container. Measure the correct proportion of catalyst for the amount of base and carefully add this to the base using a suitably clean implement. Mix thoroughly then add dye where necessary and mix to an even colour.
This material contains volatile liquid convertible to solids. Volume solids obtained will vary dependent upon polymerization conditions. Nominally greater than 99% of the contents are convertible to solid.
Practical spreading rate
32 sf per gallon at 40 mils dft Note: This information is given in good faith but mayincrease dependent upon environmental conditions, the geometry and nature of work undertaken and the skill and care of application. Corrocoat accept no responsibility for any deviation from these values.
1.2 g/cm3 for Base
Methyl Ethyl Ketone Peroxide Corrocoat Type P2 (for Ambient temperatures of 50°F (10°C) or above or Catalyst P4 (for ambient temperatures below 50°F (10°C).
100:1 to 100:3 base to catalyst.
38 Barcol (approximate)
12 to 16 x 10³ V/mm. Arc resistance 40 seconds minimum.
At 68°F (20°C) product will be hard within 3 hours and 90% cure will be attained within 10 hours. Full cure for chemical resistance will be between 6-8 days. Full cure times will be shorter at higher temperatures and longer at lower temperatures.Although not fully cured, after gel has occurred this product may be immersed in many environments without detriment to the immediate surface of the coating, the cure process continuing even when immersed.