MD3082F1 - Process for metal electrochemical protection from corrosion - Google Patents
Process for metal electrochemical protection from corrosion Download PDFInfo
- Publication number
- MD3082F1 MD3082F1 MDA20050224A MD20050224A MD3082F1 MD 3082 F1 MD3082 F1 MD 3082F1 MD A20050224 A MDA20050224 A MD A20050224A MD 20050224 A MD20050224 A MD 20050224A MD 3082 F1 MD3082 F1 MD 3082F1
- Authority
- MD
- Moldova
- Prior art keywords
- potential
- current pulse
- corrosion
- duration
- pulse
- Prior art date
Links
- 239000002184 metal Substances 0.000 title abstract 5
- 229910052751 metal Inorganic materials 0.000 title abstract 5
- 238000005260 corrosion Methods 0.000 title abstract 3
- 230000007797 corrosion Effects 0.000 title abstract 3
- 238000000034 method Methods 0.000 title abstract 3
- 239000003795 chemical substances by application Substances 0.000 abstract 2
- 150000002739 metals Chemical class 0.000 abstract 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 abstract 1
- 230000002378 acidificating effect Effects 0.000 abstract 1
- 230000004913 activation Effects 0.000 abstract 1
- 230000007423 decrease Effects 0.000 abstract 1
- 230000000737 periodic effect Effects 0.000 abstract 1
- 150000003839 salts Chemical class 0.000 abstract 1
- 235000018553 tannin Nutrition 0.000 abstract 1
- 229920001864 tannin Polymers 0.000 abstract 1
- 239000001648 tannin Substances 0.000 abstract 1
Landscapes
- Preventing Corrosion Or Incrustation Of Metals (AREA)
Abstract
Inventia se refera la un procedeu de protectie electrochimica a metalelor contra coroziunii si poate fi utilizata pentru protectia conductelor si cazanelor. Esenta inventiei consta in aceea ca procedeul prevede activarea anodica a suprafetei metalului in mediu acid la potentialul ce corespunde zonei active a metalului cu impuls direct al curentului, apoi densitatea impulsului curentului direct Dase micsoreaza pana la valorile, ce corespund potentialului zonei pasive, se include impulsul de curent invers, reglabil dupa durata si se stabilesteraportul densitatilor impulsurilor de curent direct si invers Da/Dk egal cu (3,5...6,0)·103 A/m2, cu tratarea ulterioara a peliculei de oxid formate in solutie de alcool ce contine agent de pasivizare la actiunea curentului periodic cu impuls inversreglabil dupa durata la potentialul zonei pasive.In calitate de agent de pasivizare se utilizeaza tanin si/sau saruri ale metalelor electronegative rezistente la coroziune, in cantitate de 0,8...1,8g/l si, corespunzator, de 1,5...4,0 g/l.The invention relates to a process of electrochemical protection of metals against corrosion and can be used for the protection of pipes and boilers. The essence of the invention is that the method provides for the anodic activation of the metal surface in acidic medium at the potential corresponding to the active area of the metal with direct current pulse, then the density of the direct current pulse Dase decreases to the values corresponding to the potential of the passive zone, the pulse is included of reverse current, adjustable by duration and the ratio of the direct and reverse current pulse densities is established Yes / Dk equal to (3.5 ... 6.0) · 103 A / m2, with the subsequent treatment of the oxide film formed in solution of alcohol that contains a passivating agent to the action of the periodic current with an invertible impulse after the duration to the potential of the passive zone. As a passivating agent, tannin and / or salts of the corrosion resistant electronegative metals are used, in the amount of 0.8 ... 1 , 8g / l and, correspondingly, 1.5 ... 4.0 g / l.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| MDA20050224A MD3082G2 (en) | 2005-08-08 | 2005-08-08 | Process for metal electrochemical protection from corrosion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| MDA20050224A MD3082G2 (en) | 2005-08-08 | 2005-08-08 | Process for metal electrochemical protection from corrosion |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| MD3082F1 true MD3082F1 (en) | 2006-06-30 |
| MD3082G2 MD3082G2 (en) | 2007-01-31 |
Family
ID=36643908
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| MDA20050224A MD3082G2 (en) | 2005-08-08 | 2005-08-08 | Process for metal electrochemical protection from corrosion |
Country Status (1)
| Country | Link |
|---|---|
| MD (1) | MD3082G2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2596571C2 (en) * | 2014-09-30 | 2016-09-10 | Общество с ограниченной ответственностью "Научно-исследовательский институт природных газов и газовых технологий - Газпром ВНИИГАЗ" | Method for cathode protection |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| MD192Z (en) * | 2009-06-04 | 2010-11-30 | Институт Прикладной Физики Академии Наук Молдовы | Process for thermochemical treatment of steel articles |
| MD504Z (en) * | 2011-10-19 | 2012-11-30 | Институт Прикладной Физики Академии Наук Молдовы | Process for manufacture of slightly soluble anode for cathodic protection |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4837900B1 (en) * | 1969-11-14 | 1973-11-14 | ||
| SU527928A1 (en) * | 1974-07-15 | 1979-11-05 | Предприятие П/Я А-7629 | Method of metals protection from corrosion |
-
2005
- 2005-08-08 MD MDA20050224A patent/MD3082G2/en not_active IP Right Cessation
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2596571C2 (en) * | 2014-09-30 | 2016-09-10 | Общество с ограниченной ответственностью "Научно-исследовательский институт природных газов и газовых технологий - Газпром ВНИИГАЗ" | Method for cathode protection |
Also Published As
| Publication number | Publication date |
|---|---|
| MD3082G2 (en) | 2007-01-31 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| KA4A | Patent for invention lapsed due to non-payment of fees (with right of restoration) | ||
| MM4A | Patent for invention definitely lapsed due to non-payment of fees |