腐蚀与防护教学9

NaCl2.712377.8MgCl20.380710.9MgSO40.16584.7CaSO40.12603.6K2SO40.08632.5CaCl20.01230.3MgBr20.00760.2„„035„pH8.18.3„5~10106„„„H2SH2S„„„„pHpH„pH„„„:„0.05mm/y0.51.2mm/y0.12mm/y„„„„BacterialCorrosion„5080„„„„„„SRB„„pH67.55925305565240.56283018377924540SRB2hSRB24h48hSRB(a)(b)(a)(b)SRB(c)IOB(d)SRBIOB(d)(c)1000hSRB316SEMeFeFe8442+→+−++→OHHOH8882HeH888→++OHSHSO222448+→+−−FeSSFe→+−+2222)(363OHFeOHFe→+−+−−++→++OHOHFeFeSOHSOFe2)(344222442222232SOHOHOS⎯⎯⎯⎯→⎯++↓→++3222)(221)(2OHFeOOHOHFe„„„„εnFG−=∆„„„„E0HVE0HV2Cd2eIn3eTleMn3eCo2eNi2eMo3eGe4eSn2ePb2eW3eFe3e0.4020.3420.3360.2830.2770.2500.200.150.1360.1260.110.0373Sn4eBi3eSb3eRe3eAs3eCu2eTe2eCo3eCueRh2eTl3ePb4eHgeAgeRh3e0.0070.2160.240.300.300.3370.400.4180.5210.600.7230.7840.7890.7990.804Hg2ePb2eIr3ePt2e0.8540.9871.001.195Au3eAue1.501.681LieReeRbeCseRa2eBa2eSr2eCa2eNa2eLa3eCe3eY3eMg2eAm3eSc3ePu3eTh4eNp3eBe2eU3eHf4eAl3eTi2eZr4eU4eTi3eV2eMn2eNb3eCr2eV3eTaTa2O3Zn2eCr3eGa3eFe2e3.0452.9252.9252.9232.922.902.892.872.7142.522.482.3722.372.322.082.071.901.861.851.801.701.661.631.531.501.211.181.181.100.9130.8760.810.7620.740.530.4401.2.3.12„RPPEEIacac++−=00E0cE0aE0aPaPcRI(abcdef1..,n8NiCu—Ni120hCuAuHNO3901.3„.„-1.2.„1CuFe99.992Zn88.2g/LH2SO4Fe99.998Al73g/LHCl2MnAsSbBi„„Al-MgAl2Mg3Al2Mg3„Cr12SiNiTiMo„„12AuCuCuNiNiCrZnA1MgFeHClH2SO4MgNaClZnCdZnMnMgMgAsCrFeNiFeNiTiNbTaSi()CuPdPtPdPtRuTiPtNbNbTaPdPbAlMgA12Mg3CuAlCuZnMoCl—CuFeCrAlSi1.2.3.:„1.FeNiCuAlTiMg2.PbSnZnCd3.WMoTaNb4.AuAgPt„(ASTM)„„1.2.3.„(1::PCO21MPa801.5m/s)IMC-871-D1(1:PCO21MPa800m/s)L80-CSL80-1CrL80-CSL80-1Cr„„ZZ=100%00vvv−v0vZ100%v00Z100%vv0Z0%vv0Z0%vv0„Z=100%00−„Z=100%00corrcorrcorriii−0corricorri1.2.1.852.3.4.ppm5.1SO32+O2SO422„„„1γ-Fe2O3Cr2O3NaOHOCrOFeOHCrONaFe4223232242++→++212:31.2.3.4.5.„123„1.2.3.„1.2.3.4.„„„„„„“”„„„ZnCd„SnPbCuAuCVDPVD1.2.3.4.1„„„„„2„1.2.„„„„2~5%P5~8%P9~12%P(g/L)123420~2515~2010102520252010.125258030~5020301030pH()4.1~4.485~904.4~4.690~929~10659~1035~45„Ni-PP„Ni-P„PP12%„Ni-P7µm12µm15µm15µm3„„200„„60%„→→4„/„1.2.„1.2.3.„FeNiCo„///„——„——1.2.3.1„„1.2.3.412200341123231.2.3.4.5.6.7.8.9.10.11.1.2.2„„1.2.3.4.3“”123480~1101~3min„():„:„„Fe3O4“”“”