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MIL-PRF-85285 is a military specification detailing the requirements for a high-performance polyurethane coating designed for use on aircraft and aerospace equipment. This specification outlines the standards that the coating must meet in order to ensure its durability, corrosion resistance, and performance in demanding environments.
MIL-PRF-85285 can be split into the following different types -
Type I - Aircraft application (420 grams/liter g/l maximum VOC content)
Type II - Support equipment application (340 g/l maximum VOC content)
Type III - Aircraft and support equipment application (50 g/1 maximum VOC content)
Type IV- Aircraft application with extended weatherability (420 g/l maximum
VOC content)
Class H – High solids formulation
Class W – Water borne formulation
MIL-PRF-85285A: The first revision, made in July 1987
MIL-PRF-85285B: This revision had 2 further amendments in 1988 and 1989
MIL-PRF-85285C: This is one of the earlier version of the specification, established in 1997. It was superseded in 2002 by MIL-PRF-85285D
MIL-PRF-85285D: This version had three further amendments in 2006 and 2007 and 2009. It was superseded in 2012 by MIL-PRF-85285E
MIL-PRF-85285E: Established in 2012 but superseded by the more recent version F in 2022
MIL-PRF-85285F: This is the most recent revision of the spec, established in May 2022
Purpose: The primary purpose of MIL-PRF-85285 is to establish the performance requirements for polyurethane coatings used on military aircraft and aerospace equipment. These coatings are critical for protecting the surfaces of these vehicles from corrosion, weathering, and other environmental hazards.
Properties: The specification defines the physical, chemical, and mechanical properties that the coating must possess. This includes characteristics such as adhesion strength, flexibility, impact resistance, hardness, and resistance to chemicals and solvents.
Compliance: Coatings that meet the requirements of MIL-PRF-85285 are considered compliant with the specification and can be used in military applications. Manufacturers must provide evidence of compliance through testing and certification processes.
Industry Impact: While MIL-PRF-85285 is a military specification, its influence extends beyond the defense sector. Many commercial aerospace manufacturers and suppliers also adhere to these standards to ensure the quality and performance of their products.
