U.S. Navy Alternate Fuels Program - Metallic Materials Immersion Corrosion Study - Phase 2
Abstract
This report documents a corrosion evaluation of U.S. Navy and Coast Guard shipboard fuel system metallic materials immersed in two fuels derived from biomass sources. One fuel is a 50/50 blend of Direct Sugar to Hydrocarbon-76 (DSH-76) and F-76 petroleum based fuel (MIL-DTL-16884M). The other fuel is a 20/80 ratio of Hydro-treated Depolymerized Cellulosic Diesel (HDCD) and petroleumF-76. Both fuel blends meet military specification MIL-DTL-16884M requirements. The immersion testing was performed with corrosion coupons in both static and flowing conditions and included general and crevice corrosion analysis as well as metallurgical evaluation that included scanning electron microscope (SEM) evaluation for evidence of pitting, stress cracking conditions and crevice corrosion in addition to microstructural changes, all of which could affect fuel system integrity. Fuel oil temperature was maintained at 120 F which is considered the maximum expected shipboard fuel temperature. The exposure period was for 180 days. Corrosion rates in mils per year were calculated based on corrosion coupon weight loss values.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 24, 2014
- Accession Number
- AD1068082
Entities
People
- Steven Murray
Organizations
- Naval Surface Warfare Center Carderock Division