PROCESS SPECIFICATION- SURFACE FINISH

Transcription

1 1.0 SCOPE This specification establishes the priming, painting and topcoat color requirements for components in accordance with the customer contract specifications. This procedure shall be used for aluminum or steel sheet, plate and shapes (tube, rod, channel, etc.) 1.1 Exceptions Drawings with Undefined Finish Requirements On engineering drawings for fabricated aluminum or steel parts that have no noted finish requirements, it shall be inferred that the finishing properties listed under Table 1 for appropriate metal substrates will be followed. 2.0 APPLICABLE DOCUMENTS The following publications shall be applicable to the extent specified herein, or as defined on the contract or purchase order. These publications shall be in effect as of the issues listed. Compliance with any other issues of these publications requires prior written approval from. Insofar as any of the publications referred to herein conflict with the requirements of the specification, this specification shall govern. Military Documents Available from DODSSP Subscriptions Services Desk, Building 4D, 700 Robbins Avenue, Philadelphia, PA or online at MIL-PRF-26915, Primer, Steel, Zinc Rich MIL-DTL-5541, Chemical Conversion Coatings on Aluminum and Aluminum Alloys MIL-P-23377, Primer Coatings, Aluminum, High-Solids Epoxy MIL-P-53022, Primer Coating, Steel, Corrosion Inhibiting Epoxy MIL-DTL-53030, Primer Coating, Steel, Waterbased MIL-PRF-85285, Top Paint Coating, High-Solids Polyurethane MIL-PRF-24712, Coatings, Powder MIL-DTL-15090D, Enamel, Equipment, Light Grey (Navy Formula #111) Federal Documents Available from DODSSP Subscriptions Services Desk, Building 4D, 700 Robbins Avenue, Philadelphia, PA or online at FED-STD-595, Colors used in Government Procurement A-A-59316, Abrasive Materials for Blasting Media A-A-59745, Primer, Steel, Zinc Rich TT-C-490, Chemical Conversion Coating and Pretreatments for Ferrous Surfaces Page 1 of 5

2 3.0 GENERAL REQUIREMENTS 3.1 Surface Preparation All material substrate surfaces shall receive proper pre-treatment to ensure subsequent application of primer/paint to the parent material per the applicable MIL standard or OEM specifications and/or processes. Typical methods of surface preparation for steel and/or aluminum include: Blast Media, see A-A for abrasive materials Degreasing solution Mechanical Preparation such as sanding/grinding Aluminum surfaces must be alodined/irridited per MIL-DTL-5541 NOTE: All hot rolled steel must have Mill scale removed per A-A before primer application. All cold rolled steel shall be treated with a degreasing solution and sanded or bead blasted to a near white finish. Parts shall be cured and/or dried prior to additional processing 3.2 Primer and Paint Application All primer and paint shall be applied to the parent material per the applicable MIL standard or OEM specifications and/or processes. If a conflict exists between the primer listed and the corresponding primer identified in the Top Coat specification listed in Table 1, the Top Coat specification/requirement takes precedence. 3.3 Paint Process and Part Quality All material built to this specification shall adhere to the paint process and part quality requirements identified on the purchase order, engineering drawings and supporting documentation. The in process inspection, rejection and rework requirements of the appropriate process specification shall be followed, i.e., MIL-PRF-85285, as identified in Table Powder Coating Powder Coating shall comply with MIL-PRF with tailoring as follows: Type X, Polyurethane (section 1.2.1) Use acceptable industry practice for resin and curing system (section 3.2) For aluminum applications use MIL-DTL-5541 (sections identied below) for surface preparation with tailoring as follows: Type II (section 1.2.1), Class 1A (section 1.2.2) Mechanically damaged areas may be touched-up (sections 3.4 and 3.5) No inspection or testing required (section 4.1) unless specified by contract or purchase order For steel application use Federal Specification TT-C-490 (sections identied below) with tailoring as follows: Surface cleaning method shall be selected based on the type and amount of soil and corrosion products on the items (section and 6.1.1) Type II chemical conversion (section 1.2.2) No inspection or testing (section 4.1) unless specified by contract or purchase order. 3.5 Coating Detail Sheets and Sample Coupons When requested, vendor shall provide coating detail sheets and sample coupons. Page 2 of 5

3 Table 1- Surface Finish Chart Base Material Primer or Treatment Intermediate Primer Finish or Topcoat Steel MIL-PRF MIL-DTL-53022D Type II MIL-PRF Steel ( Mayport only) A-A MIL-DTL-53022D Type II MIL-PRF Steel, Powder Coat Cleaned per A-A None MIL-PRF Aluminum Chemical Conversion per MIL-DTL-5541 MIL-DTL-53022D Type II (if painted) MIL-PRF (if painted) Aluminum (Powder Coat) Chemical Conversion per MIL-DTL-5541 NONE MIL-PRF NOTE: Final top-coat color shall be specified by contract, purchase order, or by individual part drawing. Colors shall conform to FED-STD-595 unless specified otherwise. Should final color guidance conflict exist, the purchase order takes precedence. Vendors are encouraged to contact Purchasing to resolve guidance conflicts. Page 3 of 5

4 Revisions Revision No. Date Paragraph Number Description All Initial release FL Revise Chart Matrix to include Black and White FL Revise Chart Matrix to include White FL Revise Chart Matrix to include Black/37038 and Prime/Top Coat FL Revise Chart Matrix to include Red/31136 FL All Revised procedure to include surface preparation FL Added Exceptions to Alodine/Irridite per MIL-C-5541 for aluminum parts when no definition is given on drawing FL Revise Chart Matrix to Include Navy Equip Gray MIL-DTL15090D ECR# FP /3.5 Added 3.4 to address Powder Coat requirements. Revise title of Document: was Process Specification-Prime and Paint, is Process Specification-Surface Finish. Changed from Type IX to Type X to reflect correct material that has been used on carts Added Type II as an acceptable alternate surface preparation for aluminum per Mil-DTL Added vendor requirements. Revised paragraph numbering to separate requirements for aluminum and steel applications All Global change of to ITW Military All Global change of ITW Military to Military Documents Table 1 Military Documents Table 1 Notes: Header Revision Block Delete MIL-PRF-85582, Performance Specification, Primer Coatings: Epoxy, Waterborne from the Military Documents list. Delete MIL-P and MIL-PRF from Table 1, Add MIL-P to Table 1 in place of MIL-P or MIL-PRF Delete TT-C-490 from all but 15090D paint processes. Delete MIL-PRF as powder coat alternative for all units requiring MIL-PRF top coat except MIL-DTL-15090D. Add MIL-PRF for powder coat alternative for MIL-DTL-15090D only. Added MIL-PRF and MIL-PRF to all products except those with MIL-DTL D Specification. Added notes for requirement of Mil Scale Removal to section 3.1 and Note for limitation of Powder Coating for MIL-DTL-15090D only to section 3.4 Changed Trilectron Military to Changed Issue No. to Revision No. 15 5/1/10 All Modified to reflect new paint standards as per management. 16 8/1/2010 All Modified to add powder coat for Steel and change Table /14/ /10/2011 Military Documents; Table 1 Military Documents; Table 1 Surface Finish Chart Modified MIL-P to MIL-P-53022B Type II. Modified MIL-P-53022B, Type II to MIL-DTL-53022D Type II Page 4 of 5

5 APPROVALS Glenn Greco Finish Operations Manager Miranda Kola Engineering Manager Laura Bukovan Quality Manager Page 5 of 5