- Title
- Corrosion inhibition of acid-treated geothermal brine: results from pilot testing in Southern Negros, Philippines
- Creator
- Remoroza, Alvin I.; Doroodchi, Elham; Moghtaderi, Behdad
- Relation
- 2010 World Geothermal Congress: Geothermal: The Energy to Change the World (WGC 2010). Proceedings World Geothermal Congress 2010 (Bali, Indonesia 25-29 April, 2010)
- Relation
- http://www.geothermal-energy.org/304,iga_geothermal_conference_database.html
- Publisher
- International Geothermal Association (IGA)
- Resource Type
- conference paper
- Date
- 2010
- Description
- Corrosion inhibition testing of carbon steel pipe with acid-treated brine using chemical organic inhibitor was conducted at Nasuji Sector, Southern Negros Geothermal Production Field, Philippines. Brine at 160°C was acid treated to reduce the pH from ~7 to ~4.5 and then cooled to 120°C to simulate temperature drop from a second flash system. The acid was introduced to effect pH modification of brine chemistry to delay polymerization of silica and/or prolong the induction time. Corrosion rates were monitored using linear polarization measurement probes before and after addition of sulfuric acid. Weight-loss method of measuring corrosion rates was also used by installing metal coupons. The experiment was run for more than 30 days. Corrosion inhibition of carbon steel with acid-treated brine using 10 ppm organic chemical inhibitor proved that it can substantially reduce corrosion rates.
- Subject
- corrosion inhibitor; silica inhibition; pH modification; acid-treated brine
- Identifier
- http://hdl.handle.net/1959.13/935275
- Identifier
- uon:12021
- Language
- eng
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