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Author Crawford, Larry F. ♦ Simpson, Theresa ♦ Friedersdorf, Fritz J.
Source SpringerLink
Content type Text
Publisher Springer-Verlag
File Format PDF
Copyright Year ©2003
Language English
Subject Domain (in DDC) Natural sciences & mathematics ♦ Chemistry & allied sciences
Subject Keyword certified reference materials ♦ coating mass ♦ galvanized sheet ♦ x-ray fluorescence ♦ Characterization and Evaluation of Materials ♦ Materials Science ♦ Tribology, Corrosion and Coatings ♦ Quality Control, Reliability, Safety and Risk ♦ Engineering Design
Abstract A method for the generation of hot dip galvanized sheet steel Certified Reference Materials (CRMs) certified for coating mass is described. The method produces high quality coating mass CRMs with combined estimated uncertainties (95% confidence) of about 3% relative standard deviation (rsd). Initially, coating mass x-ray fluorescence (XRF) data are collected on multiple test specimens and used to sort the test specimens by observed coating mass. Several specimens near the mean of the sorted data are retained and the remaining specimens are analyzed for coating mass by a National Institute for Standards and Testing (NIST) traceable weigh-strip-weigh analytical method. The weigh-strip-weigh data are correlated to the initial XRF data using statistical techniques. The retained specimens’ coating masses are calculated using this relationship and are used as the certified coating masses for the retained specimens. This correlation method is a more accurate and efficient technique relative to the traditional “perimeter” certification methods. The present method does not suffer from an increased estimated uncertainty due to the inherent hot dip Zn coating variability. Also, this method provides a simple means to generate NIST traceable high quality CRMs that can be tailored to meet individual users’ requirements.
ISSN 10599495
Age Range 18 to 22 years ♦ above 22 year
Educational Use Research
Education Level UG and PG
Learning Resource Type Article
Publisher Date 2003-01-01
Publisher Place New York
e-ISSN 15441024
Journal Journal of Materials Engineering and Performance
Volume Number 12
Issue Number 5
Page Count 8
Starting Page 499
Ending Page 506

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Source: SpringerLink