Search for a Pretreatment (Conversion Coating) for Aluminum

摘要

The life of an organic coating depends upon many operating factors. The coatingperformance is directly proportional to the effectiveness of the chemical conversion coating. Currently, due to environmental regulations, no aluminum pretreatment (chemical conversion coatings) is available for depot and field applications. Presently, organic coatings are being applied over the bare aluminum. The coatings are often delaminating, leaving the aluminum exposed to the corrosive environment with no camouflage, corrosion, or chemical agent protection. With no pretreatment (chemical conversion coatings), the corrosion resistance of the substrate to underfilm corrosion will be proportional to the permeability of the film. Currently, based on the literature search, none of the currently available pretreatments is practical or feasible for its use in depot or field applications. Most of the work applies to parts or unassembled equipment. jg p3.