1、www.astm.orgISBN:978-0-8031-7011-7Stock#:DS71Knotkova/Kreislova/Dean ISOCORRAG International Atmospheric Exposure Program:Summary of Results ASTM INTERNATIONALISOCORRAGInternational Atmospheric Exposure Program:SUMMARY OF RESULTSEditors:Dagmar Knotkova,Katerina Kreislova,Sheldon W.Dean,Jr.ISOCORRAGI
2、nternational Atmospheric ExposureProgram:Summary of ResultsDeveloped by ISO/TC 156/WG 4,Atmospheric Corrosion Testing and Classification of Corrosivity of AtmosphereSponsored by ASTM Committee G01 on Corrosion of MetalsDagmar KnotkovaKaterina KreislovaSheldon W.Dean,Jr.ASTM Data Series 71Stock No.:D
3、S71 Library of Congress Cataloging-in-Publication DataDean,Sheldon W.,1935ISOCORRAG International Atmospheric Exposure Program:summary of results/Sheldon W.Dean,Dagmar Knotkova,Katerina Kreislova.p.cm.Includes bibliographical references.“ASTM Stock Number:DS71.”ISBN 978-0-8031-7011-71.MaterialsDeter
4、ioration.2.Corrosion and anticorrosives.3.MaterialsTesting.I.Knotkova,Dagmar.II.Kreislova,Katerina.III.ISOCORRAG International Atmospheric Exposure Program.IV.Title.TA418.74.D426 2010620.11223dc222010005663Copyright 2010 ASTM International,West Conshohocken,PA.All rights reserved.This material may n
5、ot be reproducedor copied,in whole or in part,in any printed,mechanical,electronic,film,or other distribution and storage media,without the written consent of the publisher.Photocopy RightsAuthorization to photocopy items for internal,personal,or educational classroom use of specific clients is gran
6、ted byASTM International provided that the appropriate fee is paid to ASTM International,100 Barr Harbor Drive,PO BoxC700.West Conshohocken,PA 19428-2959,Tel:610-832-9634;online:http:/www.astm.org/copyright/ASTM International is not responsible,as a body,for the statements and opinions advanced in t
7、he publication.ASTMdoes not endorse any products represented in this publication.Printed in Bay Shore,NYMay,2010ii ContentsPreface.ivAcknowledgments.vDedication.viChapter 1:Introduction.1Chapter 2:Experimental.2Exposure Sites.2Materials.2Specimens.2Exposure Program.2Environmental Monitoring.2Exposur
8、e Initiation.2Specimen Evaluation.2Chapter 3:Results.10Environmental Data.10Mass Loss Data.15Data Analysis.15Corrosivity Classification.40Long-Term Kinetics.56Chapter 4:Analyses of Results and Summary.57Characteristics of the Database.57Comparison of the Atmospheric Corrosion Rates of Flat and Wire-
9、Helix Specimens.57Environmental Effects:1 Year Corrosion Rates.59Derivation of Dose-Response Functions for the Normative Corrosivity Category Derivation.59Long-Term Kinetics of Structural Metals.63Chapter 5:Application of Results.66References.68INDEX.72iii PrefaceMetals,protective coatings,and other
10、 materials deteriorate when exposed to atmospheric environments.When selecting materials for such applications,it is important to have information on the rate and type ofdeterioration that can occur in order to estimate the service life and economic consequences of the materi-als.A standardized corr
11、osivity classification system has been developed by the International Organizationfor Standardization(ISO)that is used throughout the world.It has been discovered that this system is lessaccurate than desired in several cases,and examples both of over and underestimation have beenobserved.As a resul
12、t,the ISOCORRAG Program was developed to provide actual exposure data to updateand improve the corrosivity classification system.This program was initiated in 1986 and closed in 1998.The improvement of the standardized corrosivity classification system was achieved by a careful evalu-ation and analy
13、sis of the results of the data from the ISOCORRAG Program.This program was the firstworldwide atmospheric testing program carried out by many different organizations in a number ofnations participating in ISO.It had a well-defined structure to obtain both short and long-term kinetics ofthe corrosion
14、 processes that affect several important structural metals,together with a monitoring pro-gram to record the environmental parameters that affect outdoor atmospheric corrosion.Subsequently,the MICAT Program was organized and carried out through the cooperative efforts of Spain,Portugal,andmany Latin
15、 American countries.There are many similarities between the ISOCORRAG and MICAT pro-grams,and there has been sharing of the data and results.The analysis of the data from the ISOCORRAG Program was based on a dose-response concept todevelop a relationship between the environmental parameters and the
16、observed corrosion rates.The analy-ses of the results have been carried out by members of ISO/TC 156/WG 4 on Atmospheric corrosion testingand classification of corrosivity of atmosphere using statistical regression analyses methods.Both the ISOCORRAG and MICAT programs were designed to find simple dose-response relationshipsbetween the environmental parameters and the corrosion damage.The UN ECE Convention on Long-Range Transboundary Air Pollution has also been involved in developing dose-respon
