Valence Everett Obtains Range Rare Lockheed Martin Approvals
Valence Everett (Everett, Wash.) has further diversified its surface treatment capabilities in the Pacific Northwest with the approval of critical Lockheed Martin Aeronautics (Bethesda, Md.) processes that support the F-35 Joint Strike Fighter. Valence would particularly like to highlight the addition and approval of its environmentally friendly Thin Film Sulfuric Anodize process. Thin Film Sulfuric Anodize is a non-hexavalent chromium substitution for the more traditional Chromic Acid Anodize. This approval makes Valence Everett only the fourth Lockheed Martin-approved Thin Film Sulfuric Anodize processor in the world. These comprehensive new approvals allow Valence Everett to support the special processing of fracture-critical structural components, including bulkheads.
Valence Everett is now offering the following Lockheed Martin processes and approvals:
- Penetrant Inspection - MIL-STD-6866/ASTM-E-1417; LM Process Code 110A
- Penetrant (Fluorescent) Inspection - LMA-PC201; LM Process Code 113
- Penetrant Inspection Fracture Critical - LMA-PC201; LM Process Code 113a
- Pre-Penetrant Etch-Aluminum - LMA-PG001; LM Process Code 148
- Conductivity Testing - LMA-PC009; LM Process Code 167
- Conductivity of Aluminum - ASTM-E-1004; LM Process Code 174
- Non-Chromic Acid Anodize - MIL-A-8625, Type 1C, see 5PTPHL23/5PTPHB20, LMA-PH090, FPS3090; LM Process Code 200A1
- Thin Film Sulfuric Anodize - LMA-PH090; LM Process Code 200V
- Chem Film - AMS-C-5541/MIL-DTL-5541, Type I, Class 1A and Class 3; LM Process Code 210
- Application and Control of Organics Finishes - LMA-PJ264; LM Process Code 240C
- Fuel Tank Coating - MIL-C-27725/AMS-C-27725; LM Process Code 242A
Types of anodizing, processes, equipment selection and tank construction.
In this paper, a review of several process solutions, examining coolants, solvent cleaning, alkaline clean/etch and deoxidizing/desmutting, listing intended and unintended chemical reactions along with possible mechanisms that would favor corrosion formation.
Anodizing for pre-prep bonding bridges the gap between the metallic and composite worlds, as it provides a superior surface in many applications on aluminum components for bonding to these composites.