Climate Tanks™ powder coated finishes resist scratches, corrosion, abrasion, chemicals and detergents, and the process can cut costs, improve efficiency, and facilitate compliance with environmental regulations. The high corrosion resistance with the modular nature of the tank build give clients significant benefits in containment security, build times and life-time costs.
Powder Coating is a type of coating that is applied as a free-flowing, dry powder. The main difference between a conventional liquid paint and a powder coating is that the powder coating does not require a solvent to keep the binder and filler parts in a liquid suspension form. The coating is typically applied electrostatically and is then cured under heat to allow it to flow and form a “skin”. The powder may be a thermoplastic or a thermoset polymer. It is usually used to create a hard finish that is tougher than conventional paint.
Powder coating is mainly used for coating metals, such as household appliances, aluminum extrusions, drum hardware, and automobile and bicycle parts. There are two main categories of powder coating: thermosets and thermoplastics. The thermosetting variety incorporates a cross-linker into the formulation. When the powder is baked, it reacts with other chemical groups in the powder to polymerize, improving the performance properties. The thermoplastic variety does not undergo any additional actions during the baking process as it flows to form the final coating. The most common polymers used are polyester, polyurethane, polyester-epoxy (known as hybrid), straight epoxy (fusion bonded epoxy) and acrylics.
Weathered finish is an advanced formula used by Climate Tanks™ that is similar to powder coating, where the extra layer of finish is applied at the factory, and when erected and exposed to the outside elements the outside finish will mature into the finished coating.
Weathered Finish Steel, often referred to by the generalized trademark COR-TEN steel and sometimes written without the hyphen as corten steel, is a group of steel alloys, which were developed to eliminate the need for painting, and form a stable rust-like appearance if exposed to the weather for several years. Weathering refers to the chemical composition of these steels, allowing them to exhibit increased resistance to atmospheric corrosion compared to other steels.
This is because the steel forms a protective layer on its surface under the influence of the weather. The corrosion-retarding effect of the protective layer is produced by the distribution and concentration of alloying elements in it. The layer protecting the surface develops and regenerates continuously when subjected to the influence of the weather. In other words, the steel is allowed to rust in order to form the protective coating; all these Climate products are delivered before turning into the final patina. It is very widely used in marine transportation, in the construction of intermodal containers as well as visible sheet piling along recently widened sections of London’s M25 motorway.
The first use of weathering steel for architectural applications was the John Deere World Headquarters in Moline, Illinois. The use of weathering steel was seen as a cost-cutting move in comparison with the contemporary railcar standard of stainless steel. Weathering steel was used to build the exterior of Barclays Center, made up of 12,000 pre-weathered steel panels engineered by ASI Limited & Shop Construction. The New York Times says of the material, “While it can look suspiciously unfinished to the casual observer, it has many fans in the world of art and architecture.”