1. ASTM A131 txoj hauv kev txwv rau corrosion tsis kam
Tus qauv tsom rauTxheej Txheem Txheej Txheem, tsis xeb kev inhibition:
Tshuaj Muaj Tshuaj: Cov qhab nia A-E tsis txausCU, CR, NI(Yuam rau huab cua cov hlau).
Txheej Txheej: ASTM A131 tsis nyobPleev xim, galvanizing, lossis clad txheej txheej.
Raug: Uncoated A131 daim hlau cia siab rauPosting-Fabrication Txheej Txheej(piv txwv li, epoxy) ib imo PSPC.
Ua hauj lwm: Cov tswv yuav ua ke Astm A131 nrogCov Qauv Corrosion Corrosion(piv txwv li, Astm A871 rau huab cua hlau).
2. Huab cua hlau sib xyaw ua ke (Astm A588 zoo li Alloys)
ASTM A131 tsis suav nrog huab cua ua huab cua, tab sisParallel Kev Pom ZooMuaj nyob:
ABS / DNV Kev Pom Zoo: Ib co mills tsim"A131-hloov kho" daim hlaunrog0.4% CU + CR, raug rau cov kev tshuaj xyuas hauv zej zog.
Kev Ua Lag Luam Kev Lag Luam:
Zoo: ~ 30% qeeb qeeb corrosion vs. qib ib nyob rau hauv marine atmospheres.
Nplij txwv: Unproven hauvib qho xwm txheej txaws; tej zaum yuav xav tauCov Anodes fij.
Kev Kawm Txog: Txwv siv nyob rau hauvHauv av barges(Astm 131 + cu-p alloy add-ons).
3. Composite coings (epoxy, galvanized, clad)
Thaum astm A131 tsis tsim nyog tso kua pleev,Kev lag luam kev ua yeeb yam sau qhov sib txawv:
Epoxy Txheej Txheem: Post-rolling pspc-raws txheej txheej (piv txwv li,300μm DFT) Muaj ntau yam rau kev tso tsheb hlau ballast.
Galvanizing: Tsawg kawg rau hulls tab sis siv nyob rau hauvSab Nraud Qauv(yuav tsum tauASTM A123 / A153ntawv pov thawj).
Clad Daim Hlau: Tawg-bonded 131+316 l stainlessRau cov tshuaj tso roj tso roj carbon monoxide (ntawv pov thawjASTM A264).
Cav: Cov tshuaj pleev ximASTM D7238Cov khoom lag luam nplaum dhau ntawm AN131 cov kev ntsuas.
4. Chav kawm hauv zej zog thiab kev tswj hwm hurdles
ABS / DNV / LR yuav tsum tauCov cai ntxivRau corrosion-resistant A131 cov neeg sib txawv:
Kev kuaj: Ntsev-tshuaj txau (Astm B117)thiabCathodic Disbondment (ASTM G8)Kev ntsuam xyuas rau coated daim hlau.
Ntawv sau: Mills yuav tsum muajTxheej Txheej Sib TwRau IMO PSPC ua raws cai.
Nqi Them Nqi: Pre-coated A131 daim phiaj nqi20-50% Ntautshaj li cov hlau liab.
Tus yam ntxwv: DNV's"Corrosion +"Cov Lus Cim Yuam Kev10-xyoo txheej txheej lav lav.
5. Lwm txoj hauv kev thiab yav tom ntej
Tawm kev daws bypass Astm A131 qhov txwv:
Hybrid Designs: A131 Hu NrogFrp Composite Topsides(Tsis tuaj yeem pom zoo).
Nano-tsho: Graphene-enhanced epoxies(hauv qab R & D; tsis tau Astm-codified).
Ntsuab hlau: H2-produced A131Nrog tsawg kawg impurities (qis corrosion initiation pheej hmoo).
Chaw saib xyuas: Yav Tom Ntej Astm Kev Kho Mob kuj yuav muab kev sib xyawCorrosion Kev Kawm Tiers.
