FIELD: protection of underground metallic structures against corrosion, possibly correction of cathode protection mode of underground pipelines while taking into account their electrolytic hydrogen absorption.
SUBSTANCE: method comprises steps of regulating polarization potential on pipeline; determining in addition value of limit electric current for electric reduction of oxygen, cathode protection current and relation of cathode protection electric current to limit electric current for electric reduction of oxygen; comparing such relation with its ultimately admissible value determined at taking into account intensity of electrolytic hydrogen absorption of pipeline wall and set no more than 50. If value of said relation exceed its admissible value cathode protection mode is changed or damage of insulation coating of pipeline is removed.
EFFECT: enhanced efficiency of cathode protection of underground pipelines.
2 tbl, 1 dwg, 1 ex
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD OF DETERMINING DURATION OF PERIOD BEFORE FORMATION OF STRESS-CORROSION CRACKS IN STEEL PIPELINES | 2007 |
|
RU2341589C2 |
| METHOD OF DEFINING INTERCRYSTALLINE CORROSION AND SURFACE DAMAGES OF UNDERGROUND AND UNDERWATER PIPELINES CAUSED BY CORROSION | 2011 |
|
RU2457465C1 |
| METHOD OF AND CORROSION-INDICATING PROBE FOR DETERMINING EFFICACY OF CATHODE PROTECTION OF UNDERGROUND STEEL STRUCTURES | 0 |
|
SU1620506A1 |
| METHOD OF CATHODE PROTECTION OF IMPELLER WITH BLADES OF TURBINE OF HYDRAULIC UNIT FROM CORROSION AND CAVITATION DESTRUCTION | 2014 |
|
RU2596514C2 |
| METHOD DETERMINING RESISTANCE OF METAL OF UNDERGROUND PIPE-LINES TO STRESS CORROSION | 2002 |
|
RU2222000C2 |
| METHOD FOR DETERMINING DEFECTS OF HYDRO-ISOLATION COVER AND CORROSION DAMAGE OF EXTERNAL SURFACES OF UNDERGROUND AND UNDERWATER PIPELINES | 2006 |
|
RU2319139C2 |
| METHOD FOR ANTI-CORROSIVE PROTECTION OF MAIN PIPELINE IN URBAN CONDITIONS. | 2020 |
|
RU2749962C1 |
| METHOD AND DEVICE FOR DETECTING PIPELINE METAL OVERPROTECTION AREAS | 2020 |
|
RU2743885C1 |
| METHOD TO MEASURE POLARISATION POTENTIAL OF UNDERGROUND METAL STRUCTURE | 2012 |
|
RU2499270C1 |
| METHOD FOR COMBINED PROTECTION OF METAL STRUCTURES FROM LIGHTNING DISCHARGES AND ELECTROCHEMICAL CORROSION | 2014 |
|
RU2584834C2 |
