Accession Number : ADA302697

Title :   Spray Coating of Metals. Phase 1. Feasibility Of Concept.

Descriptive Note : Final rept.,

Corporate Author : IDAHO NATIONAL ENGINEERING LAB IDAHO FALLS

Personal Author(s) : Ploger, Scott A. ; Hembree, Patricia B. ; Watson, Lloyd D.

PDF Url : ADA302697

Report Date : AUG 1995

Pagination or Media Count : 172

Abstract : Idaho National Engineering Laboratory (INEL) is developing a new coating technique to eliminate hazardous wastes generated by electroplating processes at Air Logistics Centers. In this approach, molten metal is sprayed in fine droplets directly onto a base metal, with near-perfect conversion efficiency and without forming any hazardous liquid or airborne wastes. This phase I feasibility study confirmed that a low-melting-point metal can be deposited with excellent adhesion and negligible porosity, while strengthening the coating layer by rapid solidification. The low-temperature spray-coating system functioned smoothly, with minor modifications to complete the test matrix. The process was successful due to the basic suitability of the Controlled Aspiration Process (CAP) and to the careful, comprehensive approach adopted in development. Tin coatings were deposited onto low carbon steel at differing sets of conditions. Sealed chamber analyses found the CAP technique to be extremely safe and environmentally benign. The favorable Phase I findings suggest that spraycoating technology could be pursued along multiple paths, aimed toward several applications. jg p3

Descriptors :   *METALS, *COATINGS, *HAZARDOUS WASTES, *SPRAYS, *ELECTROPLATING, CONTROL, QUICK REACTION, HAZARDS, LAYERS, AIRBORNE, ADHESION, PATHS, TEST METHODS, SOLIDIFICATION, POROSITY, FEASIBILITY STUDIES, AIR LOGISTICS SUPPORT, DROPS, WASTES, ELIMINATION, CHAMBERS, SEALED SYSTEMS, LIQUID METALS, BASE METAL, CARBON STEELS, ASPIRATORS, LOW ALLOY STEELS, TIN COATINGS.

Subject Categories : Inorganic Chemistry
      Physical Chemistry
      Coatings, Colorants and Finishes
      Logistics, Military Facilities and Supplies

Distribution Statement : APPROVED FOR PUBLIC RELEASE