_STP_576-1976.pdf

GALVANIC AND PITTING CORROSION-FIELD AND LABORATORY STUDIES Two symposia presented at the 1974 Materials Engineering Congress AMERICAN SOCIETY FOR TESTING AND MATERIALS Detroit,Mich.,22-23 Oct.1974 ASTM SPECIAL TECHNICAL PUBLICATION 576 Robert Baboian,W.D.France,Jr.,L.C.Rowe,and J.F.Rynewicz,editors List price$29.75 04-576000-27 American Society for Testing and Materials 1916 Race Street,Philadelphia,Pa.19103 Copyright by ASTM Intl(all rights reserved);Fri Jan 1 12:33:20 EST 2016Downloaded/printed byUniversity of Washington(University of Washington)pursuant to License Agreement.No further reproductions authorized.BY AMERICAN SOCIETY FOR TESTING AND MATERIALS 1976 Library of Congress Catalog Card Number:75-2510 NOTE The Society is not responsible,as a body,for the statements and opinions advanced in this publication.Printed in Cockeysville,Md.February 1976 Copyright by ASTM Intl(all rights reserved);Fri Jan 1 12:33:20 EST 2016Downloaded/printed byUniversity of Washington(University of Washington)pursuant to License Agreement.No further reproductions authorized.Foreword The two symposia.Galvanic Corrosion and Pitting Corrosion,were presented at the 1974 Materials Engineering Congress held in Detroit,Mich.,22-23 Oct.1974,respectively.The symposia were sponsored by the American Society for Testing and Materials Subcommittees GO 1.05 on Laboratory Corrosion Tests and GO 1.07 on Galvanic Corrosion of Com-mittee G-1 on Corrosion of Metals.L.C.Rowe,General Motors Corpora-tion,presided as symposium chairman and W.D.France,Jr.,General Motors Corporation,served as symposium cochairman of the Symposium on Pitting Corrosion.For the Symposium on Galvanic Corrosion,J.F.Rynewicz,Lockheed Missiles and Space Company,presided as symposium chairman and Robert Baboian,Texas Instruments,served as symposium cochairman.Copyright by ASTM Intl(all rights reserved);Fri Jan 1 12:33:20 EST 2016Downloaded/printed byUniversity of Washington(University of Washington)pursuant to License Agreement.No further reproductions authorized.Related ASTM Publications Stress Corrosion Cracking of MetalsA State of the Art,STP 518(1972),$11.75,04-518000-27 Manual of Industrial Corrosion Standards and Control,STP 534(1974),$16.75,04-534000-27 Corrosion in Natural Environments,STP 558(1974),$29.75,04-558000-27 Copyright by ASTM Intl(all rights reserved);Fri Jan 1 12:33:20 EST 2016Downloaded/printed byUniversity of Washington(University of Washington)pursuant to License Agreement.No further reproductions authorized.A Note of Appreciation to Reviewers This publication is made possible by the authors and,also,the un-heralded efforts of the reviewers.This body of technical experts whose dedication,sacrifice of time and effort,and collective wisdom in review-ing the papers must be acknowledged.The quality level of ASTM publica-tions is a direct function of their respected opinions.On behalf of ASTM we acknowledge their contribution with appreciation.ASTM Committee on Publications Copyright by ASTM Intl(all rights reserved);Fri Jan 1 12:33:20 EST 2016Downloaded/printed byUniversity of Washington(University of Washington)pursuant to License Agreement.No further reproductions authorized.Editorial Staff Jane B.Wheeler,Managing Editor Helen M.Hoersch,Associate Editor Charlotte E.DeFranco,Senior Assistant Editor Ellen J.McGlinchey,Assistant Editor Copyright by ASTM Intl(all rights reserved);Fri Jan 1 12:33:20 EST 2016Downloaded/printed byUniversity of Washington(University of Washington)pursuant to License Agreement.No further reproductions authorized.Contents Introduction GALVANIC CORROSION Electrochemical Techniques for Predicting Galvanic CorrosionROBERT BABOIAN 5 Laboratory Studies of Galvanic Corrosion of Aluminum AlloysFLORIAN MANSFELD AND J.V.KENKEL 20 Current Density Distribution on Composite Structures Under Cathodic Protec-tion in SeawaterK.G.COMPTON 48 Electrochemical Examination of Fused Joints Between MetalsK.G.COMPTON AND J.A.T U R L E Y 56 Galvanic Corrosion of Underground Power Distribution Cable Materials GEORGE SCHICK AND D.A.MITCHELL 69 Galvanic Coupling of Some Stressed Stainless Steels to Dissimilar Metals UndergroundE.ESCALANTE AND W.F.GERHOLD 81 Air,Soil,and Sea Galvanic Corrosion Investigation at Panama Canal Zone M.A.PELENSKY,i.J.JAWORSKI,AND A.GALLACCIO 94 PITTING CORROSION Localized Corrosion Attack on Carbon SteelCase Histories of Service FailuresHENRY suss 117 Pitting of Galvanized Steel in Controlled Clean Air EnvironmentsJ.w.SPENCE AND F.H.HAYNIE 132 Pitting Corrosion of Titanium Tubes in Hot Concentrated Brine Solutions L.C.COVINGTON 147 Pitting Corrosion in Copper Tubes in Cold Water ServiceF.J.CORNWELL,G.WILDSMITH,AND P.T.GILBERT 155 Pitting Caused by Chlorides or Sulfates in Organic MediaFLORIAN MANSFELD 180 Copyright by ASTM Intl(all rights reserved);Fri Jan 1 12:33:20 EST 2016Downloaded/printed byUniversity of Washington(University of Washington)pursuant to License Agreement.No further reproductions authorized.Measurement and Ev