NO149638B - Zinkanodelegering for offeranoder - Google Patents
Zinkanodelegering for offeranoder Download PDFInfo
- Publication number
- NO149638B NO149638B NO814438A NO814438A NO149638B NO 149638 B NO149638 B NO 149638B NO 814438 A NO814438 A NO 814438A NO 814438 A NO814438 A NO 814438A NO 149638 B NO149638 B NO 149638B
- Authority
- NO
- Norway
- Prior art keywords
- zinc anode
- anodes
- zinc
- alloy
- anode alloy
- Prior art date
Links
- 239000000956 alloy Substances 0.000 title claims description 15
- 229910045601 alloy Inorganic materials 0.000 title claims description 15
- 239000011701 zinc Substances 0.000 title claims description 10
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 title claims description 9
- 229910052725 zinc Inorganic materials 0.000 title claims description 9
- 229910052782 aluminium Inorganic materials 0.000 claims description 7
- 229910052793 cadmium Inorganic materials 0.000 claims description 6
- 239000011777 magnesium Substances 0.000 claims description 4
- 229910052749 magnesium Inorganic materials 0.000 claims description 3
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 2
- 239000012535 impurity Substances 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims 1
- 238000005260 corrosion Methods 0.000 description 9
- 230000007797 corrosion Effects 0.000 description 9
- 239000011133 lead Substances 0.000 description 6
- 238000004512 die casting Methods 0.000 description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 229910052745 lead Inorganic materials 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
- 229910052718 tin Inorganic materials 0.000 description 3
- 239000010949 copper Substances 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000004210 cathodic protection Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F13/00—Inhibiting corrosion of metals by anodic or cathodic protection
- C23F13/02—Inhibiting corrosion of metals by anodic or cathodic protection cathodic; Selection of conditions, parameters or procedures for cathodic protection, e.g. of electrical conditions
- C23F13/06—Constructional parts, or assemblies of cathodic-protection apparatus
- C23F13/08—Electrodes specially adapted for inhibiting corrosion by cathodic protection; Manufacture thereof; Conducting electric current thereto
- C23F13/12—Electrodes characterised by the material
- C23F13/14—Material for sacrificial anodes
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C18/00—Alloys based on zinc
- C22C18/04—Alloys based on zinc with aluminium as the next major constituent
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Prevention Of Electric Corrosion (AREA)
- Battery Electrode And Active Subsutance (AREA)
- Electrolytic Production Of Metals (AREA)
Description
Det har vist seg at offeranoder av zink som brukes på varme nedgravde oljeledninger i Nordsjøen, nedbrytes av interkrystallinsk korrosjon. Anodenesomer ihenhold til US-MIL.SPEC. A-18001 H og inneholder 0,10-0,50 vekt-% aluminium, 0,025-0,15 vekt-% kadmium og resten zink med mindre forurensninger av jern, kobber, bly og silisium, smuldrer opp.
At interkrystallinsk korrosjon skjer med de aktuelle anodelegeringer når de utsettes for varme, er også fastlagt ved forsøk.
Fenomenet er også velkjent fra eldre urene zinkpresstøpe-legeringer, idet det hevdes at dette skyldes aluminiuminn-holdet og for de undersøkte anodelegeringer er anrikning av aluminium påvist i korngrensene. Det hevdes at et Al-innhold på 0,03% vil forårsake dette.
Når det gjelder presstøpelegeringer som inneholder ca. 4%
Al, er årsaken til den interkrystallinske korrosjon påvist
å ligge i for høyt innhold av Sn, Pb eller Cd. Dersom dette holdes på lavt nok nivå, er det ingen problemer med interkrystallinsk korrosjon. Maksimalverdier for Pb og Cd er satt til 0,003% for hver.
Hvordan den interkrystallinske korrosjon foregår i press-støpelegeringer er lite omtalt i litteraturen, bortsett fra at det skjer når innholdet av Sn, Pb eller Cd over-
stiger en viss verdi.
Det er muligens riktig som det sies i litteraturen at aluminium trenger inn i korngrensene og anrikes der og derved sprenger bindigene, men at denne reaksjon først
finner sted når Cd-innholdet (Pb, Sn) overstiger en viss verdi. Det hevdes også at et innhold på 0,0 3% Al vil forårsake interkrystallinsk korrosjon. Dette synes noe merkelig, da innholdet i presstøpelegeringene som nevnt er 4%. Det er mulig forklaringen ligger i forskjell i krystallstruktur. Presstøpeproduktef. vil ha en finere
krystallstruktur enn anodene på grunn av støpernetodikk og av-kjølingsbetingeIser.
For presstøpelegeringer har tilsetning av Mg vist seg å være gunstig og gir en ekstra sikkerhet mot interkrystallinsk korrosjon. Tilsetningen er i spesifikasjoner satt til 0,04-0,06%, da et høyere innhold gir varmeskjørt gods med fare for sprekk-ing ved utstøting av formene.
Hensikten med oppfinnelsen er å tilveiebringe en zinkanodelegering for offeranoder hvor nedbrytningen på grunn av interkrystallinsk korrosjon unngås.
Det har tidligere ikke vært kjent med tilsetning av magnesium til slike anodelegeringer.
Oppfinnelsen vedrører følgelig en zinkanodelegering for offeranoder omfattende
0,10 - 0,50 vekt-% Al
0,025- 0,15 vekt-% Cd
resten Zn
idet legeringen er karakterisert ved at den dessuten inneholder
0,01 - 1,0 % Mg
Av ytterligere mindre mengder metaller kan legeringen inneholde Fe maksimalt 0,005 vekt-%, Cu maksimalt 0,005 vekt-%, Pb maksimalt 0,006 vekt-% og Si maksimalt 0,125 vekt-%.
Ved anvendelse av zinkanoder av sammensetningen ifølge oppfinnelsen for katodisk beskyttelse av varme nedgravde oljeledninger, vil man unngå den interkrystallinske korrosjon.
Claims (1)
- Zinkanodelegering for offeranoder omfattende 0,10 - 0,50 vekt-% Al 0,025 - 0,15 vekt-% Cd resten zink og fremstillingsbetingede forurensninger, karakterisert ved at legeringen dessuten inneholder 0,01 - 1,0% magnesium.
Priority Applications (9)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NO814438A NO149638C (no) | 1981-12-28 | 1981-12-28 | Zinkanodelegering for offeranoder |
| SE8207207A SE451145B (sv) | 1981-12-28 | 1982-12-16 | Zinkanodlegering for offeranoder |
| GB08235893A GB2112416A (en) | 1981-12-28 | 1982-12-16 | Zinc anode alloy for sacrificial anodes |
| NL8204906A NL8204906A (nl) | 1981-12-28 | 1982-12-20 | Zinkanodelegering voor opofferingsanoden. |
| DE19823248183 DE3248183A1 (de) | 1981-12-28 | 1982-12-27 | Zinkanodenlegierung fuer opferanoden |
| US06/453,152 US4462960A (en) | 1981-12-28 | 1982-12-27 | Zinc anode alloy for sacrificial anodes |
| JP57227196A JPS58117845A (ja) | 1981-12-28 | 1982-12-27 | 犠牲陽極用亜鉛合金 |
| FR8221829A FR2519027A1 (fr) | 1981-12-28 | 1982-12-27 | Alliage en zinc pour anodes sacrifiees |
| DK574882A DK157621C (da) | 1981-12-28 | 1982-12-27 | Zinkanodelegering til offeranoder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NO814438A NO149638C (no) | 1981-12-28 | 1981-12-28 | Zinkanodelegering for offeranoder |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| NO814438L NO814438L (no) | 1983-06-29 |
| NO149638B true NO149638B (no) | 1984-02-13 |
| NO149638C NO149638C (no) | 1984-05-23 |
Family
ID=19886360
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NO814438A NO149638C (no) | 1981-12-28 | 1981-12-28 | Zinkanodelegering for offeranoder |
Country Status (9)
| Country | Link |
|---|---|
| US (1) | US4462960A (no) |
| JP (1) | JPS58117845A (no) |
| DE (1) | DE3248183A1 (no) |
| DK (1) | DK157621C (no) |
| FR (1) | FR2519027A1 (no) |
| GB (1) | GB2112416A (no) |
| NL (1) | NL8204906A (no) |
| NO (1) | NO149638C (no) |
| SE (1) | SE451145B (no) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5711079A (en) * | 1995-05-22 | 1998-01-27 | Underwater Kinetics | Corrosion resistant knife |
| JP3930643B2 (ja) * | 1998-06-11 | 2007-06-13 | 新日本製鐵株式会社 | 耐食鋼 |
| CN104862530B (zh) * | 2015-06-09 | 2016-12-07 | 青岛双瑞海洋环境工程股份有限公司 | 一种适用于热海泥环境的锌合金牺牲阳极 |
| CN105618716B (zh) * | 2016-03-29 | 2018-03-13 | 中国石油集团川庆钻探工程有限公司工程技术研究院 | 一种锌阳极材料和油套管导电连接方式及加工方法 |
| CN109763029A (zh) * | 2019-03-13 | 2019-05-17 | 殷红平 | 一种高稳定性锌合金材料及其加工工艺 |
| CN117051402A (zh) * | 2023-08-10 | 2023-11-14 | 深圳市中金岭南有色金属股份有限公司韶关冶炼厂 | 一种高驱动电位锌合金牺牲阳极材料及其制备方法和应用 |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB984602A (no) * | 1900-01-01 | |||
| FR2377454A1 (fr) * | 1977-01-13 | 1978-08-11 | Petrocokino Denis | Alliage de zinc pour constituer notamment des anodes, telles que des anodes de protection cathodique |
| DE2714887C3 (de) * | 1977-04-02 | 1980-07-17 | Vereinigte Deutsche Metallwerke Ag, 6000 Frankfurt | Verwendung eines niedriglegierten Zinkwerkstoffs |
-
1981
- 1981-12-28 NO NO814438A patent/NO149638C/no unknown
-
1982
- 1982-12-16 SE SE8207207A patent/SE451145B/sv not_active IP Right Cessation
- 1982-12-16 GB GB08235893A patent/GB2112416A/en not_active Withdrawn
- 1982-12-20 NL NL8204906A patent/NL8204906A/nl not_active Application Discontinuation
- 1982-12-27 FR FR8221829A patent/FR2519027A1/fr active Pending
- 1982-12-27 JP JP57227196A patent/JPS58117845A/ja active Granted
- 1982-12-27 US US06/453,152 patent/US4462960A/en not_active Expired - Lifetime
- 1982-12-27 DE DE19823248183 patent/DE3248183A1/de active Granted
- 1982-12-27 DK DK574882A patent/DK157621C/da not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| NL8204906A (nl) | 1983-07-18 |
| DE3248183C2 (no) | 1987-10-08 |
| SE8207207L (sv) | 1983-06-29 |
| US4462960A (en) | 1984-07-31 |
| JPS58117845A (ja) | 1983-07-13 |
| DE3248183A1 (de) | 1983-07-07 |
| SE451145B (sv) | 1987-09-07 |
| GB2112416A (en) | 1983-07-20 |
| FR2519027A1 (fr) | 1983-07-01 |
| DK157621B (da) | 1990-01-29 |
| JPS6122019B2 (no) | 1986-05-29 |
| DK157621C (da) | 1990-06-18 |
| NO814438L (no) | 1983-06-29 |
| NO149638C (no) | 1984-05-23 |
| SE8207207D0 (sv) | 1982-12-16 |
| DK574882A (da) | 1983-06-29 |
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