Accession Number : ADA621463
Title : Non-Chromate, ZVOC Coatings for Steel Substrates on Army and Navy Aircraft and Ground Vehicles
Descriptive Note : Cost and performance rept.
Corporate Author : ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD
Personal Author(s) : Kelley, John ; Braswell, Thomas ; Nickerson, William ; Hagos, Luwam ; Fowler, Amy
Report Date : Dec 2014
Pagination or Media Count : 52
Abstract : The objective of this demonstration is to determine the viability of non-chromate pretreatments for High Hard Armor (HHA) steel in order to improve the long term corrosion resistance of the low-volatile organic compound (VOC) chemical agent resistant coating (CARC) system to reduce lifecycle costs for these weapon systems. Stryker and Mine Resistant Ambush Protected Armored Vehicle (MRAP) contracts are prohibited from using hex-chrome and have been coated without any corrosion inhibitive pretreatment or conversion coating. The products demonstrated satisfy the hexavalent chrome prohibition for both vehicles while minimizing environmental impact. These technologies are spray-applied pretreatments meant to be used on properly prepared steel substrates. These technologies include trivalent chromium (SurTec 650) and two non-chromium pretreatments (Chemetall Oxsilan 9810/2, and Pittsburgh Plate Glass Industries [PPG] Zircobond 4200). Trivalent chrome pretreatments have been used successfully on aluminum substrates for many years. Oxsilan 9810/2 is a phosphorus free liquid, silane-based product that is intended to enhance the performance of organic coatings. As the film dries, neighboring hydroxyl groups react with each other to form a dense, interpenetrating, crosslinked network that is chemically bound to the metal surface. Zircobond 4200 is a zirconate based pretreatment developed as a replacement for zinc phosphate. All of these pretreatments are commercially available.
Descriptors : *COATINGS , *STEEL , CHEMICAL AGENTS , CHROMATES , CORROSION RESISTANCE , COST ANALYSIS , DEMONSTRATIONS , GROUND VEHICLES , LIFE CYCLE COSTS , MILITARY AIRCRAFT , ORGANIC COMPOUNDS , PERFORMANCE(ENGINEERING) , SUBSTRATES
Subject Categories : Coatings, Colorants and Finishes
Properties of Metals and Alloys
Distribution Statement : APPROVED FOR PUBLIC RELEASE