The water transportation through carbon steel pipelines is critical due to internal corrosion. To avoid failures, barrier corrosion protection techniques are applied, by insulating the inner metal surface of the pipe. However, the welding of segments of pipes can damage the inner coating by the heat generated during the process. As a result, the ends of the tubes are uncoated and consequently subjected to corrosion. There are practical solutions to this problem, but all of them have some kind of inconvenience, either by the cost of implementation or the difficulty of application. This work aims to present the results of the application of an alternative technique: zinc thermally sprayed as sacrificial anode for internal protection of welded joints.

Subject
Zinc rich coatings, Coating application, Water, Materials, Piping, Cathodic protection, Tubes, Zinc anodes, Pipelines, Electrochemical current, Fluids, Zinc, Test specimen
Keywords:
Corrosion, thermal spray, zinc, cathodic protection
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2019
Association for Materials Protection and Performance (AMPP)
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