Hydrogen permeation and its inhibition in iron oxide cleaning solutions
- Nalco Chemical Co., Naperville, IL (United States)
Formation of deposits on metal surfaces is one of most serious problems in industrial water systems. It is well known that the build-up of deposits (scales) can reduce heat transfer rate because the deposits formed generally have a lower heat transfer coefficient than the metal substrate itself. Thus, deposit formation can reduce the efficiency of the plant and significantly increase energy costs. Deposits can also lead to enhanced localized corrosion underneath the deposits on the metal surface and reduce the useful life of the equipment. A systematic study of hydrogen permeation and its inhibition during a ferrous metal cleaning process was carried out. The amount of hydrogen that permeates a mild steel electrode of varying thickness was investigated by the Devanathan-Stachurski method in commonly used cleaning solutions with or without corrosion inhibitors. The corrosion rates of the electrodes were determined by electrochemical methods at the same time. Specular reflectance FTIR spectroscopic measurements were used to obtain the structural information on the electrode/solution interface. The data were used to develop an effective method to prevent hydrogen damage in iron oxide cleaning processes.
- OSTI ID:
- 548540
- Report Number(s):
- CONF-970332--
- Country of Publication:
- United States
- Language:
- English
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