Storage and Handling of ACRYLUME™

November 10, 1999 - ACRYLUME coated steel sheet incorporates a tough and durable protective surface film that assists in roll-forming of the sheet and imparts lasting long term corrosion protection to the material. However, the acrylic is extremely thin (approximately 1 micrometer or 1/25th of a mil) and can be damaged by abusive handling. As with other coated steel products, such as "bare" GALVALUME, the acrylic coated sheet should be stored and handled properly. This includes careful storage and handling at the roll-former and on the job site.

Conditions that have a negative impact on the ACRYLUME coated steel sheet, as well as GALVALUME sheet include:

• Marine atmospheres with constant spraying of salt or fresh water.
• Fallout of corrosive chemicals including, but not limited to, chemicals, fumes, ash, cement dust and animal wastes.
• Water run-off from lead or copper articles or contact with lead or copper.
• Corrosive fumes or condensates generated or released within the building.

Situations that may affect the long term corrosion resistance of the acrylic coated sheet include:

• Chemical or mechanical damage caused to the acrylic or metallic coating during shipment, handling, fabrication or erection.
• Failure to provide free drainage of water including condensation
• Failure to remove debris from the surface of the material.
• Prolonged contact with green or wet lumber.
• Presence of damp or wet insulation materials.

Other issues to consider include material treatment at the roll-former and job site.

At the roll-former:

• Coils must be used within 90 days of receipt at the buyer's plant.
• During storage, the coils must be kept in a dry, temperature controlled environment.
• Roll-forming should be done without the addition of oil- or water-based lubricants.
• During storage in bundle form, the material should be kept in a dry, temperature controlled environment.
• During shipment, the bundles must be covered to protect the shipment from moisture penetration.

At the job-site:

• The bundles should be protected from the weather by storing indoors or by storing the bundles on protected pallets with canvas or other waterproof covering, leaving the bottom open for adequate air movement.
• The bundles must also be protected from exposure to corrosive chemicals and fumes.

Acrylic coatings do provide many benefits over traditionally treated sheet steel products but are not completely impervious. Abusive storage and handling can alter the excellent corrosion resistance of these coatings.