Savannah, GA,
07
June
2012
|
06:59 PM
America/New_York

Comprehensive Corrosion Solution

Summary


Great Dane's all-new line of reefer trailers, the Everest Series, come standard with floor systems utilizing anti-corrosion features consisting of composite floor sills, organic-coated floor and sill screws, and an improved sub-pan. These three distinct technologies combine to form a comprehensive solution for protecting trailers from moisture and corrosion.

Great Dane's all-new line of reefer trailers, the Everest Series, come standard with floor systems utilizing anti-corrosion features consisting of composite floor sills, organic-coated floor and sill screws, and an improved sub-pan. These three distinct technologies combine to form a comprehensive solution for protecting trailers from moisture and corrosion.

Corrosion in reefer floors with wood sills results when water enters the floor insulation cavity and is soaked up by the cellular, natural wood Apitong sills. Great Dane's Everest Series reefers utilize composite floor sills, which do not act like a sponge and do not absorb water.

Moisture can also corrode traditional floor and sill screws allowing for further water penetration into the floor cavity. At Great Dane, the use of organic coatings helps reduce the possibility of these screws corroding. Composite sills are secured to the cross-members using sill screws that employ a special three-layer coating system to prevent corrosion. The system includes two-layer inorganic zinc and polymer base-coats as well as aluminum and polymer organic topcoats. Combined, the characteristics of these materials provide both an excellent barrier to corrosion and a sacrificial layer, effectively doubling the protection of conventional treatments.

The same or similar organic coatings are proving highly successful as barriers against corrosion in several carefully selected and extensively tested fastener applications on Great Dane trailers, such as nuts, bolts, screws and other types of hardware. In addition to attaching reefer floors to composite sills and sills to cross-members, other areas where these screws are now in standard use on Great Dane reefers is for attaching cargo track and scuff-bands to walls.

A third and equally important component in addressing corrosion in reefer floors is an improved subfloor pan. The insulated floor cavity of a refrigerated trailer is an especially critical area because it is continuously exposed to the environment, including exposure to road de-icing chemicals and cleaning agents.

Great Dane's reefer subfloor pan, in use since 2008, is stronger and less porous, not to mention lighter weight. In terms of puncture resistance, testing has revealed that the glass-reinforced polypropylene sub pan has exhibited more than twice the strength of competitive offerings, making it less likely to be punctured or cut and provide an entry path for moisture. In addition, permeability tests have shown an exceptional ability to prevent moisture intrusion, all with a weight savings of 40 lbs per 53-foot trailer.

By employing several proven technologies as a system, Great Dane is effectively and proactively addressing corrosion in reefer floors.