Corrosion characteristics and geothermal power plant protection (collateral processes of abrasion, erosion and scaling)

Corrosion engineering in the utilization of the Raft River geothermal resource

“…of a t t a c k was reported t o be related more closely t o s t a t i c corrosion r a t e s rather than t o the hardness o f the metal as one might a n t i c i p a t e . (24) found erosion corrosion t o be a s i g n i f i c a n t f a c t o r in turbine blade performance in the Larderello, I t a l y , geothermal The r a t e steam plants. They found that brass and chromium-nickel stainless steels are not suitable for this application.…”

“…r o c h l o r i c a c i d a r e compared i n F i g u r e 2.3.1.The r e s i s t a n c e s o f P I C and r e g u l a r concrete t o a t t a c k by(24) Cement-asbestos i s corroded by C02 contained i n t h e b r i n e. Corrosion occurs by d i s s o l u t i o n o f t h e l i m e i n t h e binder. examination o f cement asbestos p i p e used i n geothermal s e r v i c e a t Boise, P r e l i m i n a r y Idaho, has n o t shown evidence o f a t t a c k .…”

Research and Development on Coatings and Paints for Geothermal Environments: A Review

“…Examples of components affected by atmospheric corrosion include cooling towers, electricity transmission lines, and transformers. [ 18 ]…”

“…Geothermal fluids thus generally contain numerous dissolved and/or free components such as minerals, salts, and gases. [6,[9][10][11][12][17][18][19] Corrosion, scaling, and erosion (often combined), as later described, represent the three main degradation mechanisms in geothermal systems. [18] The occurrence of corrosion and scaling is directly related to the presence of specific "key species" within the fluid, while erosion is connected to the mechanical action of the geothermal fluid and hard particles in the fluid, traveling at high flow speed.…”

“…[6,[9][10][11][12][17][18][19] Corrosion, scaling, and erosion (often combined), as later described, represent the three main degradation mechanisms in geothermal systems. [18] The occurrence of corrosion and scaling is directly related to the presence of specific "key species" within the fluid, while erosion is connected to the mechanical action of the geothermal fluid and hard particles in the fluid, traveling at high flow speed. [17,18] A list of the most common key species that have been identified in geothermal fluids, together with their main effects, is summarized in Table 1.…”