 |
Wednesday, March 19, 2008 - 8:05 AM
Convention Center, Second Level, R09 (Ernest N. Morial Convention Center)
08228
The Effect of Ultrasonically Induced Cavitation Conditions on the Behavior of Copper and Cobalt-Based Alloys in Seawater
╨╧рб▒с > ■ + - ■ * ье┴ q` Ё┐ 0 ё bjbjqPqP . : : ё д Ь Ь Ь Ь Ь Ь Ь ░ t t t t А ░ щ ╢ Ш Ш Ш Ш Ш Ш Ш Ш h j j j j j j $ Я h ╨ О Ь Ш Ш Ш Ш Ш О Ь Ь Ш Ш г , , , Ш v Ь Ш Ь Ш h , Ш h , , Ь Ь , Ш М ЁbQб№╨╟ t
, T ╣ 0 щ , ╫
╫
, ╫
Ь , ( Ш Ш , Ш Ш Ш Ш Ш О О "
Ш Ш Ш щ Ш Ш Ш Ш ░ ░ ░ ─ t ░ ░ ░ t ░ ░ ░ Ь Ь Ь Ь Ь Ь
A cavitation facility was used to study the cavitation corrosion behavior of carbon steel (UNS G10200), Cu-Ni 70-30 and cobalt-based alloy (UNS R30006) in seawater. The work included measurements of free corrosion potentials, and mass loss in presence and absence of cavitation. The cavitation tests were made at a frequency of 20 KHz and at temperatures of 250C. Cavitation conditions caused a noble shift in the free corrosion potential for carbon steel and an active one for Cu-Ni 70-30 and cobalt-based alloys. Cavitation also increased the rate of mass loss of these alloys by several orders of magnitude with respect to stagnant conditions. Cavitation made the surface of these alloys very rough, exhibiting large cavity pits in the middle region of the attacked area as revealed by the scanning electron microscope (SEM). Mechanical factors were determined to be the leading cause of metal loss.
Keywords: Cavitation, carbon steel, Cu-Ni 70-30, Stellite 6B, seawater, Free corrosion-potential.
R t Н Ш j k ╩ ь Н ╝ Ё ё ·Ї·Ї·ы·ф·Ї·▌╓╥ hг`ў
hzh° 5БCJ
h$M@ 5БCJ
hzh° CJ H*hю3л hzh° CJ
h$M@ CJ
hzh° CJ М Н я Ё ё ў ў ў ў ў ї $a$gdzh° ё ■ , 1Рh ░╨/ ░р=!░"░#Ра$Ра%░ ░╨░╨ Р╨ Ж Ь 8 `ё 8 zh° N o r m a l _H4mH sH tH D A@Є б D D e f a u l t P a r a g r a p h F o n t R i@є │ R T a b l e N o r m a l Ў 4╓
l 4╓ aЎ ( k@Ї ┴ ( N o L i s t ё М Н я Ё є Ш 0 А А Ш 0 А А Ш 0 А А Ш 0 А А Ш 0 А А Ш 0 А А ё ё ё
- 7 ' o y Л Х Ч б ╛ ╞ є є є є х ╣. $M@ г`ў zh° Ё є А @А ю ю АЙ Ж Ж ю ю ё @ @ U n k n o w n GР Зz А T i m e s N e w R o m a n 5Р А S y m b o l 3&Р Зz А A r i a l " qИ Ё╨ h у╖╞1у╖╞ Ц [ Ц [ ! Ё а┤ ┤ ББr4 я я 2ГQ Ё HP )Ё ? ф zh° 2 г A c a v i t a t i o n f a c i l i t y w a s u s e d t o s t u d y t h e c a v i t a t i o n c o r r o s i o n b e h a v i o r o f c a r b o n s t e e l ( U N S G 1 0 2 0 0 ) , C u - N i 7 0 - 3 0 a n d c o b a l t - b a s e d a l l o y ( U N S R 3 0 0 0 6 ) i n s e a w a t e r D r . A b d u l h a m e e d A L - h a s h e m D r . A b d u l h a m e e d A L - h a s h e m ■ рЕЯЄ∙OhлС +'│┘0 0 Р Ш D P t А М Ь └ ╠
ь °
( ф д A cavitation facility was used to study the cavitation corrosion behavior of carbon steel (UNS G10200), Cu-Ni 70-30 and cobalt-based alloy (UNS R30006) in seawater Dr.Abdulhameed AL-hashem Normal Dr.Abdulhameed AL-hashem 1 Microsoft Office Word @ xA╦ @
s∙╨╟@ фЕ№╨╟ Ц [ ■ ╒═╒Ь.УЧ +,∙о0 Ф h p Д М Ф Ь д м ┤ ╝
─ t ф KISR-prsc я ц д A cavitation facility was used to study the cavitation corrosion behavior of carbon steel (UNS G10200), Cu-Ni 70-30 and cobalt-based alloy (UNS R30006) in seawater Title ■
■ ■ ! ■ # $ % & ' ( ) ■ ¤ , ■ ■ ■ R o o t E n t r y └ F рОXб№╨╟. А D a t a
1 T a b l e W o r d D o c u m e n t . S u m m a r y I n f o r m a t i o n ( D o c u m e n t S u m m a r y I n f o r m a t i o n 8 " C o m p O b j q ■ ■
└ F Microsoft Office Word Document
MSWordDoc Word.Document.8 Ї9▓q
See more of Marine Corrosion & Transport - Session 1
See more of Technical Symposium
See more of The CORROSION 2008 Conference and Expo (March 16-20, 2008)
See more of Technical Symposium
See more of The CORROSION 2008 Conference and Expo (March 16-20, 2008)