Disruptive Pattern Camouflage Polyurethane …

1 specification 0502 Disruptive Pattern Camouflage Polyurethane finishing System for Vehicles & Equipment 0502 Rev. No. 2 15 June 2007 Authorised by Executive Officer, APAS Page 1 of 14 Copyright APAS 2007 Editorial Note- This version of the specification eases the corrosion creep requirements in , changes lamp type for QUV accelerated weathering testing and clarifies requirements in Table 1. APAS Document D188 should be read to obtain a broad overview of the Australian Paint Approval Scheme (APAS). Manufacturers who wish to participate in APAS within Australia should consult APAS documents D177 (for Australian manufacturers), D178 (for overseas manufacturers) & D180 (for toll manufacturers). Manufacturers who wish to participate in APAS within their own countries should consult APAS document D175.

2 APAS approval to this specification may be gained by compliance with the requirements detailed in this specification and those in document D192 The APAS Product Approval System . APAS Documents may be downloaded from the APAS web site located at: 1. Scope Description & guide for users A two pack Polyurethane paint system to be used for the finishing and refinishing of vehicles and equipment of the Australian Defence Services. The system is to be a chemical agent resistant coating which, when applied as instructed in this document, provides a Disruptive Pattern (DP). Available in a low gloss (APAS 0502/1) or flat (APAS 0502/2) finish and at reflectance levels specified to maximise Camouflage whilst maintaining a reduction in solar heat absorption in comparison to the conventional coatings described in APAS 0154.

3 The paint systems shall be suitable for use over suitably pretreated ferrous and non-ferrous metal surfaces, suitably treated non-metallic surfaces and also over aged Polyurethane or alkyd paintwork. The finishing paint, when applied by spray in accordance with the manufacturer s directions to a vertical surface, shall produce a film of dry thickness 25 - 35 m. All paints and pre-treatments shall be prepared and applied according to the manufacturer s instructions. Particular care should be taken to ensure that the manufacturer s instructions are followed regarding application conditions and recoating times. (a) Application to Ferrous Metals Metal pre-treatment by phosphating or abrasive blast cleaning as described in AS is followed by the application of an epoxy primer to APAS 0502/3 or of a suitable commercial multipurpose primer to APAS 0502/5 (primer may be applied in one or, if necessary, two coats, to achieve a total primer DFT of 30-50 m), followed by two coats (each having a DFT of 25-35 m) of the Camouflage green Polyurethane finish, APAS 0502/1 or /2.

4 The Disruptive Pattern is produced as specified for the vehicle concerned by the application of the DP colours, each to a DFT of 35-50 m. The paint system is to be applied so that at no point should the DFT be less than 80 m or greater than 190 m. The priming paint should be applied so that at no point should the primer DFT be less than 30 m. (b) Application to Non Ferrous Metals Metal pre-treatment is to be by conversion coating or by abrasive blasting. Where it is not possible for these pre-treatments to be employed, an alternative is the application of an etch primer to APAS 0035/2. Note that etch primers should not be used other than in exceptional circumstances. The etch primer should only be used on small surfaces that are difficult to clean and prepare for painting and not for general surface pre-treatment.

5 Note that if used, the etch primer should not be over-coated with the epoxy primer for 24 hours. Pre-treatment is followed by the application of an epoxy primer to APAS 0502/4 or of a suitable commercial multipurpose primer to APAS 0502/5 (primer may be applied in one or, if necessary, two coats, to achieve a total primer DFT of 30-50 m), followed by the Polyurethane finish coats as described in (a) above. The paint system is to be applied so that at no point should the DFT be less than 80 m or greater than 190 m. The primer should be applied so that at no point should the primer DFT be less than 30 m. (c) On Previously Painted Surfaces Where practical, the preferred procedure is to remove any oil, grease or wax and to strip the existing coating back to bare substrate by abrasive blasting (as per AS ), followed by full repainting as described in (a) or (b) above.

6 For cases where the full repainting is not practical, the aged painted surface should be cleaned using a suitable solvent or an alkaline detergent wash (followed by a water wash) to remove any oil, grease or wax, followed by light abrasion of the aged Polyurethane or aged alkyd paint using whip blasting, mechanical sanding or hand sanding with a fine grade of paper. Abrasion should continue until a sound, well-adhered, defect-free paint film is reached with a uniformly well-abraded surface. Paint application should be similar to the methods described in (a) and (b) above, with the application of epoxy primer (DFT 30-40 m) and one coat of Camouflage green Polyurethane finish paint (to APAS 0502/1 or /2, DFT 40-50 m), followed by the application of subsequent paint layers to produce the Disruptive Pattern as described in (a) above.

7 Areas where abrasion has exposed bare substrate should be painted as described in (a) or (b) as appropriate. Sub-classes This specification covers sub-groups: 0502/1 Low gloss DP Camouflage finish coat 0502/2 Flat DP Camouflage finish coat 0502/3 Epoxy primer for steel 0502/4 Epoxy primer for aluminium 0502/5 Multipurpose epoxy primer for steel and aluminium 0502/6 Thinner Basis of this specification APAS 0502/1 & 0502/2 are similar to the coatings described in APAS 0154, but satisfy all of the requirements outlined in Table 1. APAS 0502/3 is an epoxy primer for steel similar to MIL-P-53022 but also satisfying all of the requirements outlined in Table 1. APAS 0502/4 is a chromate free epoxy primer for aluminium similar to BMS 10-79, urethane compatible primer, but also satisfying all of the requirements outlined in Table 1.

8 APAS 0502/5 is a multipurpose epoxy primer suitable for use on steel and aluminium that fulfils all of the requirements outlined in Table 1 in the sections For each component primer and finishing paints and For all cured priming paints , and when used with the finish coats satisfies all of the requirements outlined in the section For the complete, cured coating system of Table 1. APAS 0502/6 is thinner which is compatible with the finish coatings (APAS 0502/1 and 0502/2) described in this specification . Thinned paint must comply with all performance requirements outlined in Table 1. 2. Other relevant documents Compliance 0502 Rev. No. 2 - 15 June 2007 Authorised by Executive Officer, APAS Page 2 of 14 Copyright APAS 2007 Paints approved under this specification do not comply with any of the paint types referenced in either AS/NZS 2311 or AS/NZS 2312.

9 Referenced documents AS/NZS 1580: Paints and related materials - Methods of test. AS/NZS 2311: Guide to the Painting of Buildings. AS/NZS 2312: Guide to the protection of structural steel against atmospheric corrosion by the use of protective coatings. AS : Metal finishing Preparation and pre-treatment of surfaces; Part 4: Abrasive blast cleaning. These documents are available in Australia from Standards Australia in all capital cities (and on-line at ). In New Zealand, they are available from Standards New Zealand offices. Uniform Paint Standard (Appendix I of the Standard for the Uniform Scheduling of Drugs & Poisons), available from Australian Government Info bookstores in all capital cities. APAS 0035/2: One pack etch primer (wash primer), chromate free - available from the APAS web site ( ).

10 APAS 0154: Polyurethane finishing System for Vehicles & Equipment - available from the APAS web site ( ). APAS 0165: Alkyd Disruptive Pattern Paint (Vehicles & Equipment) - available from the APAS web site ( ). MIL-P-53022B: Military specification for "Primer, Epoxy Coating, Corrosion Inhibiting, Lead & Chromate Free". MIL-C-46168A (MR) Military specification for "Coating Aliphatic Polyurethane , Chemical Agent Resistant." MIL-PRF-85285D Military specification for "Coating: Polyurethane , Aircraft and Support Equipment." MIL-D-50030H (EA) Military specification for "Decontaminating Agent, DS2." Military Specifications are available through commercial sources. Boeing Material specification : BMS 10-79: Urethane compatible, corrosion resistant primer (available from Boeing Aircraft Limited).