Evaluation of Corrosion Protecting Properties of Modern Aircraft Paint Systems

摘要

For long term protection and corrosion prevention the flexibility, adhesion andcorrosion-inhibiting properties of paint systems are important. At the National Aerospace Laboratory (NLR) the flexibility, adhesion and corrosion protecting properties of several modern paint systems have been examined. Since paint cracking around fasteners under operational conditions usually occurs at low temperatures, this was examined by tensile testing of painted metal strips at -50 C. After tensile testing the degree of paint delamination (loss of adhesion) was established, and cross-sections were made to examine this delamination on a microscopic scale. The corrosion protecting capability of paint systems was determined by exposing specimens with pre-cracked paint systems and crossed scribe lines to an accelerated corrosion test (MASTMAASIS). In this investigation the different paint systems had the same topcoat, Aerodur HF A 132. Since Plastic Media Blasting (PMB) is a potential method for replacing the chemical paint stripping procedure, PMB and various cleaning operations were also considered.