Hpi nghj KHCN 2000 "Nganh Dau khi Viet Nam tru''''dc them theky 21'''' SO SANH VA LLTA CHON CAC CHAT CTC CHE AN MON THEP CACBON TRONG HE THONG BOM tP NL/OC BI^N TAI M 6 BACH HO VA M 6 RONG Vien si TSKH Vu D[.]
Hpi nghj KHCN 2000 "Nganh Dau Viet Nam tru'dc them theky 21' SO SANH VA LLTA CHON CAC CHAT CTC CHE AN MON THEP CACBON TRONG HE THONG BOM tP NL/OC BI^N TAI M BACH HO VA M RONG Vien si TSKH Vu Dinh Huy XNLD Vietsovpetro TS Nguyen Thi Phuang Thoa Cit nhan Pham Viet Hiing, Cd nhan Nguyen Thai Hoang DH Qudc gia Tp HCM - TrUdng DHKH Td nhien TOM TAT Nude bien thudng dugc sir dung cac he thong bam ep nude nham tri ap suat via Ba chat uc che an mdn thuang pham da dugc danh gia su tuong hgp vgi cac hoa pham dau khae dung dich nude bien thdng va toai Cac phuang phap ton that khoi lugng va dien hda da dugc sir dung de tinh toan toe an mdn thep, hieu qua Uc che an mdn va khao sat ddng hoc eiia qua trinh an mon Dua tren cac ket qua thuc nghiem da thao luan ve ca che kim ham an mdn ciia nhirng chat Uc che dugc nghien cdu, tu dd da lua chgn hai chat Uc che an mgn eg hieu qua LOI M d OAU Nhung nam g i n day, nude bien da duge Lien doanh Vietsovpetro sir dung cac he thd'ng bam ep nude nham tri ap suit via ciia md diu Bach Hd va Rdng d them luc dja mien Nam Viet Nam Nude bien la mdt phirc he hoa hgc gdm nhung vi lugng cac ion, eae tap chit va cae hoat chit sinh hgc [7] Cac yeu td quan trgng nhat anh hudng den sy an mdn thep caebon nude bien la tdng lugng cac chit ran hda tan, cae ion clorua, sunfat, sunfua va bieaebonat Cae ion natri, kali va canxi lam tang pH ciia nude bien [7] Oe lam giam nhe sy xam nhap eua vi khuan khir sunfat (SRB) - mdt cac ngudn sinh hidro sunfua via d i u - ngudi ta bam djnh ky cac chit diet khuan vao he thdng bam ep nude bien De bao ve dudng dng bam ep nude bien va cac thiet bi khdi sy an mdn ben trong, phai lam giam ham lugng oxy nugc bien de'n 0,015 mg/l bing each bam lien tue chat khir oxy hoae ket hgp vgi sy khir oxy bang thap hiit chan khdng Cac chit ire che an mdn dugc bam vao nuac bien da loai oxy nham giu tdc an mdn ben khdng vugt qua gidi han cho phep la 0,1 mm/nam [8] Lya chgn chit Uc che, ap dung chit ire che va kiem tra an mdn ben la ba bude ea ban eua qua trinh nghien cUu uc che an mdn he thd'ng bam ep nuac bien Sy thir nghiem sang Igc cac chit Uc che an mdn thuang pham phdng thi nghiem mdt each can than va ky ludng la mdt bude quan trgng dam bao tinh tdan ven va hieu qua eiia chit Uc che duge sir dtjng he thdng bam ep nude bien Trong nghien cuu eiia chiing tdi, cae chat Ue che an mdn COINBAC 18, COINBAC 84 va TECHNI HIB 377 diing cho he thdng bam ep nude bien da dugc danh gia sy tuang hgp vdi cae hoa pham diu khae hoa tan nude nhu chit khir oxy, chit khu bgt, eae chit Igc phu trg va chat diet khuan CAC PHLTONG PHAP THl/C NGHIEM Chuan bj cac dung djch th^ nghiem nen 351 Hpi nghi KHCN 2000 "Nganh Dau Viet Nam trifdc them theky 21' Nude bien duac lay d sau 10 m, each bd bien ciia phd Vung Tau khoang 130 km Thanh phin hoa hgc va tinh chit eiia nugc bien dugc trinh bay Bang Bang t Thanh phin hoa hgc ciia nude bien (Do mudi 3,38 %, din dien 4,1mS/cm, ham lugng oxy hga tan 6,8 mg/l, ham lugng vi khuan khir sunfat 10 dan vj/ml va pH = 7,6) Ion SQl HCOj- COj'- Ca'* Mg'* Na*, K* 2594,10 85,40 30,01 367,40 1226,67 11374,65 cr Ham luang i (mg/l) 19143,00 Dung dich nen A, dung cho cac thir nghiem vdi nhung chit uc che an mdn - diet khuan COINBAC 84 va COINBAC 18 gdm cd : nude bien + chit khir bgt SURFLO AF 3376 (1 ppm) + chit Ige phu trg Polyelectrolyte TECHNI BREAK 6524 (2 ppm) + chit Ige phu trg Sit (III) Sunfat (2,5 ppm) Dung dich nen B, dung cho cae thir nghiem chit Ue che an mdn TECHNI HIB 377, gdm ed : nude bien + chit khu bgt SURFLO AF 3376 (1 ppm) + chit Ige phu tra Polyelectrolyte TECHNI BREAK 6524 (2 ppm) + chit Ige phu tra Sit (III) Sunfat (2,5 ppm) + chat diet khuan SURFLO B6798 (500 ppm) Khi oxy hda tan dugc loai khdi dung djch nen B bing each them vao mdt lugng 100 ppm chit khir oxy TC 1000 tai luc bit diu thyc nghiem va lien tiJC thdi tra nita vao dung djch Nhung ddi vdi dung djch nen A va nude bien thi ddng thdi vai viee thdi tra nita vao lien tuc, oxy hoa tan dugc loai bing each them vao chit khir oxy TC 1000 vdi lugng 100 ppm tai luc bat diu thyc nghiem va 50 ppm sau 12 gid ngam miu nham ngan ngUa sy nhiem ban them nua Ham lugng oxy hoa tan duac bing may CELLOX 352 Do lirdng tdn that khdi lUdng Loai thep N80 duac sir dung de nghien eUu ed phin djnh danh nhu Bang Bang Thanh phin dinh danh ciia thep N80 (% trgng lugng) Nguyen td Ham lugng, % C Mn SI P S Mo Cr Ni Cu Sn Al 2,4 1,35 2,3 0,09 0,05 0,35 0,6 0,8 1,46 0,1 2,5 Trong mdi thi nghiem da sir dung hai miu thep N80, kich thudc miu la 50 x 20 x mm Miu duac danh bdng, duge rira bang nugc may, trang bang nude eat, cudi eiing trang bang aceton Lam khd miu khdng va bao quan binh hut am ehua silicagen Can m i u tren can phan tich METTLER TOLEDO AB 204 cd dd chinh xac den 0,1 mg Nhung ngap miu cac dung djch thir nghiem: khuiy dung djch bing may khuiy tU BIBBY HB 502 vdi tdc 100 vdng/phut Dieu chinh nhiet d 30°C ± r C Tl le tdi thieu eiia the tieh dung dieh tren dien tieh miu la 20 ml/cm2 Thdi gian ngam miu dung djch la 4, 8,16va24gid Danh gia tdn thit trgng lugng miu theo cac tieu chuan ASTM G1-90 va ASTM G31-72 [1,2] Hieu qua Uc che an mdn (Z) eiia chit dc che duge danh gia bang each tdc an mdn trung binh ciia thep dung djch khdng cd (Vo) va cd chat ire che (V) Hieu qua ire che an mdn dugc tinh theo edng thurc: Z(%) = 352 v„-v v„ xlOO (1) Hpi nghj KHCN 2000 "Nganh Dau Viet Nam trifdc them theky 21' Tdc an mdn dugc tinh tU cae sd lieu tdn that trgng lugng nhu sau: ,„ , - K X Ton that luong (g) V(mm/nam) = — ^ , — ^ — ' ^, Kiioi lugng rieng (g/cm ) x Dien tichi (cm ) x Ttidi gian (gio) ,„, (2) dday, hangsdK = 8,76x104 Khao sat dirdng cong phan ciTc the dong Sy phan eye dugc thyc hien tren may Potentio-Galvanostat PGS HH6 Phan eye andt va eatdt tren thep N80 nude bien, cac dung djch nen khdng ed va ed chat ire che duac tien hanh theo tieu chuan ASTM G5-94 [4] Dien eye lam viee duge che tao tU thep dai 20 mm va dudng kinh 9mm Oanh bdng miu bing giiy nham cd hat 600, lam sach aceton, trang bang nude eat, de khd va diie bgc nhya Speeifix-20 Be mat lam viec hinh trdn cd dien tich 0,64 cm' dugc de hd Trudc mdi thi nghiem phin dien tieh lam viee eiia miu duge danh bdng bang giay nham, tay dau md bang rugu etylie, trang bang nude eit va lam khd khdng Dien eye ddi la day platin, ed dien tich be mat cm' Dien eye so sanh la dien eye calomel bao hda (SCE), dat ngan each biet Tit ea cac gia tri the dien eye deu dugc so sanh vdi dien eye ealomen bao hda Tdc dd quet the la 0,5va1,0mV/s Mat ddng an mdn (i^^J dugc xac djnh bang phudng phap dien trd phan eye tuyen tinh theo phuang trinh Stern - Geary (phuang trinh 3,4) va phuang phap ngoai suy Tafel dua tren eae tieu chuan ASTM G102-89 [4] va ASTM G59-91 [5] ' (3) Rp vdi B = A^^^^^ (4) 2,303 x ( b , + b j Rp (ohm.cm'): dien trd phan eye; ba , be (mV): ddc Tafel ciia dudng phan eye andt va eatdt Sau dd tinh tdc an mdn dya tren i„„ theo cdng thire sau: ,(mA/cm') V(mm/nam)^K, ,^, ,,, 'corrV".^o,M y^ ^ ^ ^ ^ ^ Kti6i luong rieng cua m i u (g/cm^) ^^^ day, EW - duang lugng ciia miu, Kl = 3,27 (mm.g/mA cm nam) KET QUA VA THAO LUAN Kiem tra sir nhiem ban oxy tir khong cac dung djch thir nghiem Nhu minh hga Hinh 1, mac dii sy loai oxy nude bien ddng da thyc hien bang each them vao 100_ ppm chit khir oxy TC 1000 tai thdi diem bit diu thi nghiem va bom nitd vao lien tue, ham lugng nvi; nhiom h^n rt5 tann e:aii khnann fl rt\ft \W, r.nW,i.,^ A j _ i j i ' i.u-2 r\ ^r\ n _ • • oxy nhidm ban da tang sau khoang gid thi nghiem va dat den khoang 0,30 mg/l sau 24 ^gid 353 Hpi nghj KHCN 2000 "Nganh Dau Viet Nam trifdc them theky 21' 0.4 0.3 X o o> c §• E -CT3 0.2 0.1 0.0 10 30 20 Thdi gian ngam mau (gid) Hinh Sy phu thuge ciia ham lugng oxy nhidm ban nude bien ddng va loai vao thdi gian ngam miu: 1- Them 100 ppm chat khir oxy TC 1000 tai thdi diem bat diu thi nghiem va bam nita lien tuc 2- Them 100 ppm chat khir oxy TC 1000 tai thdi diem bat diu thi nghiem va 50 ppm sau 12 gid ngam mau, bam nita lien tuc Oe ngan ngUa sy nhiem ban ke tren, chiing tdi da thyc hien thi nghiem thir hai: them vao nude bien ddng chat khir oxy TC 1000 vdi ham lugng 100 ppm tai thdi diem bat diu thi nghiem va 50 ppm sau 12 gid thi nghiem va bdm nita vao lien tue Dung nhu dy doan, ham lugng oxy nhiem ban chi tang len mdt it khoang tu de'n 12 gid va sau 20 gid ngam miu Do lirdng ton that khdi lu'dng a Tdc an mdn thep N80 nude bien, cac dung dich nen A, nen B d dieu kien thdng va loai Sd lieu Bang va Hinh ehi ring, tdc an mdn trung binh eiia thep N80 nude bien dgng loai thip han nuac bien ddng thdng khoang ba lin sau tit ca cac khoang thdi gian ngam miu 4, 8,16 va 24 gig Bang Tdc an mdn thep N80 eae dung djch ddng Thdi gian ngam mau (gid) Toe an mon thep (mm/nam) Thdng Loai Nude bien Dung djch nen A Dung dich nen B Nude bien Dung djch nen A Dung dich nen B 1,010 1,040 1,156 0,351 0,238 0,985 0,699 0,776 0,952 0,242 0,131 0,638 16 0,581 0,632 0,884 0,192 0,097 0,416 24 0,457 0,481 0,778 0,167 0,075 0,370 354 Hpi nghj KHCN 2000 "Nganh Dau Viet Nam trifdc them theky 21' Sy loai oxy hda tan khdi dung djch nen A da lam giam tdc an mdn trung binh ciia thep N80 tdi 4,4 - 6,6 lin; nhung dung djch nen B, sy loai bd oxy chi' lam giam tdc an mdn ciia thep N80 khoang 1,2 - 2,1 lan sau gid den 24 gid ngam miu Them vao nude bien chit khir bgt SURFLO AF 3376 (1 ppm), cac chat Igc phu trg TECHNI BREAK 6524 (2 ppm) va Sat (III) Sunfat (2,5 ppm) de tao dung djch nen A, tdc an mdn eiia thep bi tang len dieu kien thdng nhung lai giam di dieu kien loai Them chit diet khuan SURFLO B 6798 (500 ppm) vao dung djch nen A de tao dung dich nen B, tdc an mdn ciia thep N80 tang len dang ke ca dieu kien thdng va loai T.G Braga [6] da ehi ring, cac chit diet khuan (cac aldehyt, hypoelorit va elorin) phan ung vai bisunfit (chit khir oxy), va vi the, lam giam tdc khir oxy, lam giam lugng oxy ed the bj liy di va lam giam hoat tinh sinh hgc Nhu vay, cae chat diet khuan khdng tuang hgp vdi bisunfit Nhung ket qua neu tren cho thiy ring, eae phan ung an mdn thep rit nhay cam vdi sy cd mat ciia oxy va cae hoa pham, phu gia diu khi, Ndi mdt each khae, phai nghien eiru xem xet nhung anh hudng eiia cac hoa pham hoae sy thay ddi dieu kien xir ly de'n qua trinh an mdn thep 1.2 Nude bien thong Idii Dung dich nen A thong ]r3 J= •D •D 30 5D 20 IT ^ 10 10 15 20 25 30 Thdi gian ngam man (gicf) Hinh Anh hudng cua thdi gian ngam mau va ndng COINBAC 84 de'n hieu qua uc che an mdn thep dung dich nen A dgng vdi loai oxy c Anh hudng ciia COINBAC 18 den tdc an mdn thep N80 dung dich nen A ddng va loai oxy chira 100 ppm COINBAC 84 Bang va Hinh trinh bay tdc an mdn trung binh eiia thep N80 dung djch nen A, chua COINBAC 84 (100 ppm), khuiy, loai oxy, va duge bd sung them COINBAC 18 d cac ndng khae Hieu qua ire che an mdn ciia hdn hgp COINBAC 84 va COINBAC 18 dugc dua Bang va Hinh Bang Anh hudng cua ndng COINBAC 18 den tdc an mdn thep dung djch nen A chua 100 ppm COINBAC 84, khuay va loai oxy Tdc an mon thep (mm/nam) Nong COINBAC 18 (ppm) gid gid 16 gid 24 gia 0,147 0,089 0,054 0,048 10 0,099 0,080 0,048 0,037 50 0,091 0,062 0,039 0,029 100 0,071 0,051 0,031 0,024 120 0,062 0,047 0,028 0,021 357 0,16 Sau gid 014 Sau gic< ai2 Sau 16 gicf 0.1 Sau 24 gi(l 0.08 c ao6 Toe mon (mmy'nam) Hpi nghi KHCN 2000 "Nganh Dau Viet Nam trifdc them theky 21' 0.04 0.02 -10 10 30 50 70 90 110 130 150 Nong dp COINBAC 18 (ppm) Hinh Anh hudng ciia ndng COINBAC 18 va thdi gian ngam miu den tdc an mdn thep N80 dung djch nen A ddng va loai oxy, cd ehira 100 ppm COINBAC 84 Bang Anh hudng eua thdi gian ngam miu va ndng COINBAC 18 den hieu qua ire che an mdn thep ciia hdn hgp COINBAC 84 va COINBAC 18 dung djch nen A, ehira COINBAC 84 (100 ppm ), dugc khuay va loai oxy Hieu qua uTc che an mon (%) 358 Nongdo COINBAC 18 (ppm) gid gid 16 gid 24 gid 38,24 32,06 44,33 36,00 10 58,40 38,93 50,52 50,67 50 61,76 52,67 59,79 61,33 100 70,17 61,07 68,04 68,00 120 73,95 64,12 71,13 72,00 Hpi nghj KHCN 2000 "Nganh Dau Viet Nam trifdc them theky 21' 80 • ppm COINB.i.C 18 ^ ^ •COINB.AC 18 (10 ppm) 60 •COINBAC 18 (SOppm) 40 •COINBAC 18 (100 ppm) 20 10 15 20 Thdi gian ngam nuiu (gi(1) 25 -JK—COINBAC 18 (120 ppm) Hinh Anh hudng eiia thdi gian ngam miu va ndng COINBAC 18 den hieu qua ue che an mdn ciia cac hdn hgp COINBAC 84 va COINBAC 18 dung djch nen A, ehira COINBAC 84 (100 ppm), dugc khuiy va loai oxy TU eae sd lieu Bang - va Hinh - chiing ta cd the thay ring, hieu qua dc che an mdn thep eua hdn hgp COINBAC 84 va COINBAC 18 cao han nhieu so vdi chi dung rieng COINBAC 84 Han nua, hieu qua Uc che an mdn eiia hdn hgp bi anh hudng khdng dang ke bdi thdi gian ngam miu va ham lugng oxy nhidm ban dung djch Neu eho ddng thdi vao dung djch nen A, khuiy va loai oxy, ca COINBAC 84 (100 ppm) va COINBAC 18 (120 ppm) thi tdc an mdn trung binh eiia thep N80 giam di bd'n lin tu 0,08 - 0,24 mm/nam tdi 0,02 - 0,06 mm/nam, va hieu qua dc che an mdn ciia hdn hgp dat tdi 6474%, sau - 24 gid ngam miu d Sy phu thudc ciia tdc an mdn thep N80 va hieu qua uc che an mdn ciia TECHNI HIB 377 vao ndng chit Uc che va thdi gian ngam mau dung dich nen B, dugc khuay va loai oxy Tu Bang - va Hinh - dd dang nhan thiy, tang ndng TECNI HIB 377 tU den 15ppm dung djch nen B dugc khuiy va loai oxy thi tdc an mdn trung binh ciia thep N80 giam di khdng dang ke td 0,37 - 0,99 mm/nam den 0,31 - 0,63 mm/nam, tuang dng vai hieu qua Ue che an mdn thep tU 17 den 36%, sau tu - 24 gid ngam mau Bang Tdc an mdn trung binh ciia thep N80 dung djch nen B, khuiy va loai oxy, ehua TECHNI HIB 377 d cac ndng khae Nong TECHNI HIB 377 (ppm) gid gid 16 gid 24 gid 0,985 0,638 0,468 0,370 0,802 0,552 0,423 0,337 0,721 0,537 0,401 0.322 10 0,672 0,525 0,390 0,311 15 0,626 0,505 0,380 0,306 Tdc an mon thep (mm/nam) 359 Hpi nghi KHCN 2000 "Nganh Dau Viet Nam trifdc them theky 21' • — After hours 1.2 • — After hours A—After 16 hours • — After 24 hours , 0.2 12 15 18i Nong cua TECHNI HIB Ml (ppm) Hinh Anh hudng eiia ndng TECHNI HIB 377 va thdi gian ngam m i u len tdc an mdn trung binh ciia thep N80 dung djch nen B, khuiy va loai oxy Bang Anh hudng ciia ndng ciia TECHNI HIB 377 va thdi gian ngam miu len hieu qua ure che an mdn thep dung dich nen B, duge khuay va loai oxy 360 Hieu qua uTc che an mon (%) Nong TECHNI HIB 377 (ppm) gid gid 16 gid 24 gid 18,58 13,48 9,62 8,92 26,80 15,83 14,32 12,97 10 31,78 17,71 16,67 15,95 15 36,45 20,85 18,80 17,30 Hpi nghj KHCN 2000 "Nganh Dau Viet Nam trifdc them theky 21' "TECHNI HIB 377 ppm 40 ^ L 35 Jso S S 25 •-•"" ihp HK ihp H^ Khi tang ndng COINBAC 84 dung dich nen A da loai khi, the an mdn eua thep N80 djch 361 Hpi nghj KHCN 2000 "Nganh Dau Viet Nam tru'dc them theky 21' chuyen den eae gia tri am han, ddc Tafel ciia phan ung andt (bJ hiu nhu khdng thay ddi, nhung ddc Tafel eatdt giam di Them vao dd, dien trd phan eye tang dang ke (khoang hai lin), va vi the, mat ddng an mdn thep (i„J giam rd ret Cae ket qua eho thiy COINBAC 84 tae dung nhu mot chit isc che hdn hgp, hip phu tdt len be mat thep va bao ve thep bdi hieu dng che chin Cac khuynh hudng tren cung duge nhan thay eho hdn hgp ciia COINBAC 84 va COINBAC 18 dung dich nen A loai oxy Nhung chit cd the uc che nhe phan Ung andt, lam thay ddi ea che ciia phan Ung eatdt, nhung tae ddng chinh eiia chiing la tao mang hip phu kbit chat tren be mat thep Nguge lai, TECHNI HIB 377 dung djch nen B hiu nhu khdng lam thay ddi the an mdn va ddc Tafel andt, nhung nd lam tang ddc Tafel eatdt va dien trd phan eye, va vi vay, lam giam mat ddng an mdn thep Nhu vay, TECHNI HIB 377 ed the la chat Ue che eatdt, ed sy hien dien ciia nd cac dung djch nghien ciru thi phan irng eatdt bi khdng che bdi ddng hgc khueeh tan nhieu han Bang 10 Cac thdng sd ddng hoe dien hoa eiia qua trinh an mdn thep N80 dung djch thir nghiem tinh V ba, •be, mV mV mV Rp.10-^ ohm cm^ Nude bien thdng 610 48 275 0,674 0,264 3,066 Nude bien loai 698 47 310 1,295 0,137 1,591 Dung djch nen A loai (A) 732 101 263 8,34 0,156 1,812 50 741 110 214 9,17 0,126 1,464 19,23 100 (A*) 751 116 202 13,40 0,117 1,359 25,00 200 780 121 169 18,28 0,078 0,906 50,00 10 784 120 164 18,98 0,071 0,825 54,49 50 787 122 157 19,64 0,057 0,662 63,46 640 35 244 0,720 0,185 2,149 645 36 298 1,128 0,149 1,731 19,46 645 36 363 1,183 0,141 1,638 23,78 10 645 36 368 1,194 0,136 1,580 26,49 15 645 36 374 2,144 0,116 1,347 37,30 Cac dung djch tinh A -H Coinbac 84 (ppm) A*-H Coinbac 18 (ppm) Dung djch nen B loai khi(B) B -H Technihib 377 (ppm) 'corr ' corr mA/cm^ mm/ nam Z,% 17,81 Mae du tdc an mon tire thdi eiia thep N80 eae dung djch tTnh, xac djnh bing phuang phap phan eye the ddng (Bang 10), khae vdi cae tdc an mdn trung binh sau thdi gian dai ngam miu cac dung djch ddng, xac djnh bing phuang phap tdn that trgng lugng (Bang va Bang 9) nhung khuynh hudng bien thien ciia nd nhan dugc tu hai phudng phap la nhu KET LUAN Sy loai oxy hda tan khdi nude bien dgng lam giam ba lan tdc an mdn cua thep caebon Tdc an mdn thep caebon rit nhay cam vdi sy ed mat eua cac hda pham diu he thdng bam 362 Hpi nghj KHCN 2000 "Nganh Dau Viet Nam trifdc them theky 21' ep nude bien Cac chit dc che an mdn-diet khuan COINBAC-84, COINBAC 18 va hdn hgp eua chiing la nhu'ng chat Uc che hdn hgp, eon TECHNI HIB 377 la chit ure che eatdt ddi vdi sy an mdn eua thep mdi trudng nude bien COINBAC 84 va COINBAC 18 tao mang hip phu bao ve hieu qua han so vdi TECHNI HIB 377 Hieu qua ue che an mdn thep cua TECHNI HIB 377, COINBAC 84, hdn hgp COINBAC 84 va COINBAC 18 deu tang len vdi sy tang ndng cua chiing va vdi sy giam ndng oxy hda tan cac dung djch thir nghiem COINBAC 84 va COINBAC 18 la nhUng chat dc che an mdn hUu hieu va diet khuan manh nude bien cd ehda cac vi khuan ua va ky bao gdm ea vi khuan khir sulfat Chiing ed the dugc sir dung thay the cho chit ire che an mdn kem hieu qua TECHNI HIB 377 va chit diet khuan rit ddc SURFLOB6798 cac he bam ep nude bien tai md d i u Bach Hd va md Rdng TAI LI£U THAM KHAO ASTM G1 -90: Standard practice for preparing cleaning, and evaluating corrosion test specimens ASTM G31 - 72: Standard practice for laboratory immersion corrosion testing of metals ASTM G5 -94: Standard reference test method for making potentiostatic and potentiodynamic anodic polarization measurements ASTM G102- 89: Standard practice for calculation of corrosion rates and related information from electrochemical measurements ASTM G59- 91: Standard practice measurements for conducting potentiodynamic polarization resistance Braga T.G Effects of commonly used oilfield chemicals on the rate of oxygen scavenging by sulfite /bisulfite Copyright 1987, Society of petroleum Engineers, pp.137 -143 Carevi/ J., Hashem A Al- and Salman M Corrosion inhibitor selection for carbon steel in a seawater flooding system In :"Proeeeding Book of the 10th Asia - Pacific Corrosion Control Conference", 27- 31 October 1997, Bali - Indonesia, pp A4.1/6 - A4 6/6 Ho Si Thoang Viet nam oil and gas sector and corrosion I n : " Proceeding of The 11th Asian - Pacific Corrosion Control Conference", -5 November, 1999, Ho Chi Minh City Vietnam, Vol 1, pp 109 -125 363 ... day platin, ed dien tich be mat cm'' Dien eye so sanh la dien eye calomel bao hda (SCE), dat ngan each biet Tit ea cac gia tri the dien eye deu dugc so sanh vdi dien eye ealomen bao hda Tdc dd... an mgn thep da bj thay ddi: Trong nude bien thdng khi: Fe -H OH" ^ Fe(OH)hp -^ e - ^ Fe''*,3„) -H OH- -H e- (phan Ung andt) 1/2 0, -H H,0+ 2e- 0H- (phan irng eatdt) Trong nude bien loai oxy, co... Viet Nam trifdc them theky 21'' 80 • ppm COINB.i.C 18 ^ ^ •COINB.AC 18 (10 ppm) 60 •COINBAC 18 (SOppm) 40 •COINBAC 18 (100 ppm) 20 10 15 20 Thdi gian ngam nuiu (gi(1) 25 -JK—COINBAC 18 (120 ppm)