1. Basic Introduction to C70600
C70600 yog ib tug raug 90-10 tooj liab-nickel alloy, nrog ib tug nominal tshuaj muaj pes tsawg leeg ntawm 90% Cu, 10% Ni, nrog rau me me ntxiv ntawm hlau thiab manganese. Nws yog dav siv nyob rau hauv seawater piping systems, heat exchangers, thiab marine hardware. Cov hlau no ua rau nyias, ua raws, thiab tiv thaiv corrosion khoom zaj duab xis nyob rau hauv zoo li qub los yog qeeb-ntws seawater, xa zoo dav corrosion kuj. Txawm li cas los xij, nws cov yeeb yaj kiab tiv thaiv yog qhov yooj yim rau kev puas tsuaj hauv cov dej hiav txwv siab tshaj plaws, cov dej xuab zeb, lossis cov dej paug hauv hiav txwv, uas ua rau muaj kev yaig-corrosion.
2. Sib piv nrog C71500 (70-30 Copper-Nickel Alloy)
C71500 yog 70-30 tooj liab-nickel alloy, muaj kwv yees li 70% Cu thiab 30% Ni, kuj muaj cov kab hlau thiab manganese.
Nyob rau hauv cov nqe lus ntawm ntshiab seawater corrosion kuj, C71500 yog superior rau C70600.
Cov ntsiab lus ntau dua nickel txhim khu kev ruaj ntseg thiab adhesion ntawm passive zaj duab xis hauv dej hiav txwv. C71500 nthuav tawm zoo dua rau pitting corrosion, crevice corrosion, thiab erosion-corrosion, tshwj xeeb tshaj yog nyob rau hauv high-ceev seawater, muaj kuab paug seawater, thiab seawater muaj sulfides.
C70600 yog tus nqi ntau dua tab sis muaj qis dua qhov kev tiv thaiv corrosion thiab tsuas yog tsim rau cov cheeb tsam me me marine nrog cov nqi qis thiab dej zoo.
3. Sib piv nrog lwm cov Marine Corrosion-Resistant Alloys
Titanium Alloys (piv txwv li, Qib 2, Qib 7 Titanium)
Titanium thiab nws cov alloys tsim ib qho kev ruaj khov thiab ntom ntom titanium dioxide passive zaj duab xis hauv dej hiav txwv. Lawv muaj kev tiv thaiv zoo heev rau pitting, crevice, thiab kev ntxhov siab corrosion cracking nyob rau hauv txhua yam ntawm seawater ib puag ncig, nrog rau cov dej hiav txwv kub, dej hiav txwv muaj kuab paug, thiab high-velocity tej yam kev mob. Titanium alloys muaj qhov zoo tshaj plaws seawater corrosion tsis kam tshaj C70600 tooj liab-nickel alloy, tab sis lawv kim dua thiab muaj cov machinability tsis zoo thiab weldability piv nrog C70600.
Duplex Stainless Steels (piv txwv li, 2205, 2507)
Duplex stainless hlau muaj siab chromium, molybdenum, thiab nitrogen cov ntsiab lus, muab zoo heev tiv thaiv chloride-induced pitting thiab crevice corrosion. Nyob rau hauv cov dej hiav txwv txhoj puab heev, tshwj xeeb tshaj yog nyob rau hauv qhov chaw nyob ruaj khov los yog crevice ib puag ncig, duplex stainless steels outperform C70600. Txawm li cas los xij, nyob rau hauv high-ceev seawater nrog cov khoom siv yaig, tooj liab-nickel alloys suav nrog C70600 tuaj yeem ua tau zoo dua li qee qhov duplex stainless hlau vim lawv cov cavitation zoo dua.
C72200 yog ib qho kev ua tau zoo tooj liab-nickel alloy hloov nrog chromium thiab lwm yam khoom. Nws tau txhim kho kev tiv thaiv rau sulfide-polluted seawater thiab biofouling piv nrog C70600. Nws cov dej hiav txwv zoo corrosion kuj zoo dua li ntawm C70600, tshwj xeeb tshaj yog nyob rau hauv ntug dej hiav txwv thiab chaw nres nkoj dej nrog cov organic paug.
4. Cov lus xaus
Ntawm cov tooj liab-nickel alloys, C71500 (70-30 Cu-Ni) muaj zoo tag nrho cov seawater corrosion tsis kam tshaj C70600 (90-10 Cu-Ni). Thaum muab piv nrog cov ntaub ntawv uas tsis yog tooj liab-nickel marine, titanium alloys thiab high-alloy duplex stainless hlau pom zoo heev corrosion kuj nyob rau hauv hnyav seawater tej yam kev mob, deb tshaj C70600. C70600 tseem yog ib qho kev xaiv zoo rau cov chaw nyob nruab nrab hauv hiav txwv tab sis tsis yog cov khoom siv zoo tshaj plaws rau cov xwm txheej corrosion hnyav.
