Materials Performance

JAN 2011

Materials Performance is the world's most widely circulated magazine dedicated to corrosion prevention and control. MP provides information about the latest corrosion control technologies and practical applications for every industry and environment.

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Page 15 of 83

Material Matters In situ corrosion monitoring helps preserve shipwreck artifacts KPWZ[ ?PQTM UIVa Q\MU[ PI^M JMMV ZMKW^MZML NZWU \PM IZKPIMWTWOQKIT [Q\M _PQKP TQM[ JMVMI\P \W N\ \W U WN _I\MZ UIVa UWZM IZM [\QTT TaQVO WV \PM WKMIV ÆWWZ QVKT]LQVO ITT NW]Z IV- chors and 13 cannon. Full recovery of the large artifacts such QAR archaeologists Wendy Welsh (left) and Chris Southerly (right) take a corrosion potential reading with a platinum electrode on Anchor 3. Image by Rick Allen, Nautilus Productions— ZI\M *TIKSJMIZL ZIV IOZW]VL off the coast of North Caro- TQVI QV \PM )\TIV\QK 7KMIV VMIZ *MI]NWZ\ 1VTM\ IVL _I[ TW[\ ]V\QT Q\[ LQ[KW^MZa QV !! ;QVKM \PMV IZKPIMWTW- OQ[\[ _Q\P \PM =VLMZ_I\MZ )ZKPIMWTWOa *ZIVKP =)* WN \PM 6WZ\P +IZWTQVI ,MXIZ\- UMV\ WN +]T\]ZIT :M[W]ZKM[ .WZ\ .Q[PMZ 6WZ\P +IZWTQVI PI^M ZMKWZLML \PW][IVL[ WN IZ\QNIK\[ NZWU \PM [PQX_ZMKS QVKT]LQVO A 14 MATERIALS PERFORMANCE January 2011 KI[\ QZWV KIVVWV IVL NW]Z _ZW]OP\ QZWV IV- lmost 300 years ago Queen Anne's Re- venge (QAR), the 200 \W \WV ÆIO[PQX WN \PM QVNIUW][ XQ- as the cannon and anchors isn't possible at the present time due to limited funding IVL QV[]NÅKQMV\ _M\ [\WZIOM [XIKM QV \PM lab, says Wendy M. Welsh, conservator and lab manager for the UAB's QAR +WV[MZ^I\QWV 4IJ )JW]\ \_W aMIZ[ IOW the UAB started an in situ corrosion monitoring and cathodic protection (CP) project on one of the QAR's major iron artifacts to determine its susceptibility to KWZZW[QWV I[ _MTT I[ ZML]KM Q\[ KWZZW[QWV potential and improve the stability of the iron. Welsh notes that monitoring the WJRMK\[ XZW^QLM[ \PM IZKPIMWTWOQ[\[ _Q\P IV indication of their condition and helps \PMU LMKQLM _PQKP WVM[ [PW]TL JM [MTMK\ML next for recovery based on the corrosion stability of one object over another.

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