MD3082F1 - Process for metal electrochemical protection from corrosion - Google Patents

Process for metal electrochemical protection from corrosion

Info

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
Application number
MDA20050224A
Other languages
Romanian (ro)
Other versions
MD3082G2 (en
Inventor
Vilghelm Cosov
Tatiana Cosova
Nicolae Taran
Vitali PAVLOV
Alexandru Matiusenschi
Julia Palamarciuc
Original Assignee
Vilghelm Cosov
Tatiana Cosova
Nicolae Taran
Vitali PAVLOV
Alexandru Matiusenschi
Julia Palamarciuc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Vilghelm Cosov, Tatiana Cosova, Nicolae Taran, Vitali PAVLOV, Alexandru Matiusenschi, Julia Palamarciuc filed Critical Vilghelm Cosov
Priority to MDA20050224A priority Critical patent/MD3082G2/en
Publication of MD3082F1 publication Critical patent/MD3082F1/en
Publication of MD3082G2 publication Critical patent/MD3082G2/en

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  • 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.

MDA20050224A 2005-08-08 2005-08-08 Process for metal electrochemical protection from corrosion MD3082G2 (en)

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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

Cited By (1)

* Cited by examiner, † Cited by third party
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