Corrosion and Corrosion Control
an endless battle against nature
Mitigation of DC Stray Current Interference in Cathodic Protection Any stray current discharging from the buried pipeline to earth will lead to corrosion. The amount of current discharged iss controlled by many factors: coating, potential gradient, current density etc. The…
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Attaching of cathodic protection cable by pin brazing and aluminothermic weld (Cadweld) Brazing is the process of joining metal by heating the base metal to a temperature above 800°F and adding a nonferrous filler metal that melts below the base…
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AC corrosion became a known issue since more and more pipelines are sharing ROW with HVAC transmission lines. It is caused by the metal loss due to AC current leaving the pipeline. There are three different types of AC interference,…
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Information gathering Compliance Requirements Local legislation Applicable industrial standards Company engineering practice Supplemental requirements Service Environments Soil River Offshore Concrete Electrolyte Characterisation Resistivity Corrosivitiy, e.g. temperature Chemical composition, typically Chloride, TDS Microbial status Cathodic Protection System Factors Structure materials and…
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-A Digest from NACE International Publication 6A100 Coating Used in Conjunction with Cathodic Protection Key Points for Protective Coatings Corrosion prevention by protective coatings is due to their dielectric properties; The dielectric properties will be deteriorated during the service due to…
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