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3M Scotchkote™ 323/323i- Liquid Epoxy Coatings for Corrosion Protection

Product Description
3M™ Scotchkote 323/323i Liquid Epoxy Coatings are two-part systems designed to protect steel pipe and other metal surfaces from the harsh affects of corrosion.

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  • Intended Uses
  • As a patch material.
  • As a girthweld coating.
  • As an internal lining
  • As a stand alone coating for pipe rehabilitation.
  • In a wide variety of other field applications where corrosion protection of metal is required.

Product Features

  • No solvents needed.
  • High build, up to 45 mils/1150 microns in one application
  • Applicable by cartridge, brush, roller or plural component spray.
  • Excellent adhesion.
  • 100% solids.
  • Can be applied to a substrate as cold as 41°F / 5°C.
  • Meets the requirements of AWWA C210, - 97 clause 4.3.4.1
  • Certified to ANSI/NSF Standard 61, Drinking Water System Components.

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Chemical Resistance
Scotchkote 323/323i are resistant to damage by acids and bases in the pH range of 2 to 14. It is also resistant to hydrocarbons such as crude oil, motor oil, gasoline and many solvents. Testing is suggested if the coating is to be used in continual contact with oxidizing agents such as sodium hypochlorite (bleach) and aggressive solvents such as methyl ethyl ketone (MEK).

General Application Steps
For use as a joint coating, a refurbishing coating or as a pipe coating:

  • Remove oil, grease and loosely adhering deposits.
  • Abrasive blast clean the surface to NACE No. 2/SSPCSP10, ISO 8501:1, Grade SA 2 1/2 near-white metal.
  • Ensure the abraded surface is cleaned of abrading debris with the use of an air blast or a clean lint free cloth.
  • Within four hours of blasting as per the above cleaning process and with the metal above 41˚F / 5˚C and a minimum of 37°F/3˚C above the dew point, apply Scotchkote 323/323i at a minimum thickness of 635 microns or 25 mils.
  • Allow to cure.
  • Visually or electrically inspect the coating for defects.
  • Repair all defects using Scotchkote 323/323i as a repair material.
For use as a repair material in the field where scratches or other holidays may have occurred as a result of shipping damage, etc., and the bare area of steel substrate exposed exceeds approximately 20 mm diameter or about 0.6 sq. in. or 400 sq. mm:
  • Remove oil, grease and loosely adhering deposits.
  • Abrade the FBE surface with medium grit sandpaper (approximately 80 grit). Powered rotary sanders are anacceptable means to perform this task. Ensure that the surrounding FBE is roughened for 10 mm on all sides.An anchor pattern of 40 to 100 microns is preferred on the substrate.
  • Ensure the abraded surface is cleaned of abrading debris with the use of an air blast or a clean lint free cloth.
    With the metal above 41˚F/5˚C and a minimum of 37°F / 3°C above the dew point, apply Scotchkote 323/323i at a minimum thickness of 635 microns or 25 mils.