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Integrated Coating System For Corrosion Protection Of Carbon Steel In Artificial Geothermal Brine

Picture for Integrated Coating System For Corrosion Protection Of Carbon Steel In Artificial Geothermal Brine
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Geothermal energy is a promising choice for alternative energy resources due to its reliability and low CO2 emissions. One way to harness this energy, is to extract hot fluid from a geothermal well. Geothermal fluids are a complex medium with different physical and chemical properties depending on the location and depth of a geothermal well. Thus, these fluids can be corrosive to the geothermal power plant depending on the corrosivity class. The geothermal power plant consists of various parts, such as pipelines and heat exchangers. For continuous power generation, this power plant should be safe and durable. Therefore, it is important to protect the infrastructure in this environment from corrosion.

Product Number: 51322-17708-SG
Author: Gabriela Aristia, Le Quynh Hoa, Ralph Bäßler
Publication Date: 2022
Industries: Corrosion Monitoring and Control , Coatings and Linings , Coatings
$0.00
$20.00
$20.00

Corrosive geothermal brines are a major challenge to geothermal power-plants. For cost reasons, plant designers prefer to use carbon and low alloyed steels, which are susceptible to uniform and localized corrosion when exposed to geothermal brines having acidic and saline properties. To solve such problem, coatings or inhibitors would be a protective solution as an alternative to the use of high alloyed materials.

This study investigated a coating system consisting of polyaniline/silicon dioxide based on resources locally available in Indonesia. Protection against corrosion of carbon steel was shown by long-term (28 day) exposure and electrochemical tests of coated carbon steels, performed in an artificial acidic and saline geothermal brine, comparable to the conditions encountered at a site in Indonesia.

Therefore, an integrated coating system is proposed for corrosion protection, combining the electrochemical functionality of polyaniline and the physical advantages of silica.

Corrosive geothermal brines are a major challenge to geothermal power-plants. For cost reasons, plant designers prefer to use carbon and low alloyed steels, which are susceptible to uniform and localized corrosion when exposed to geothermal brines having acidic and saline properties. To solve such problem, coatings or inhibitors would be a protective solution as an alternative to the use of high alloyed materials.

This study investigated a coating system consisting of polyaniline/silicon dioxide based on resources locally available in Indonesia. Protection against corrosion of carbon steel was shown by long-term (28 day) exposure and electrochemical tests of coated carbon steels, performed in an artificial acidic and saline geothermal brine, comparable to the conditions encountered at a site in Indonesia.

Therefore, an integrated coating system is proposed for corrosion protection, combining the electrochemical functionality of polyaniline and the physical advantages of silica.

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