Characterization of volatile corrosion inhibitors using the quartz crystal microbalance and supporting techniques
- Cortec Corp., St. Paul, MN (United States)
Corrosion inhibitors such as Volatile Corrosion Inhibitors (VCI`s) and Contact Corrosion Inhibitors have become loosely ambiguous and differentiating between the two can become a gray area. For example, and the most common mistake is, classifying a material as a VCI when it is a contact inhibitor. Analytical techniques to qualify a material as a VCI have been investigated in order to clarify this ambiguity and to qualify the techniques and equipment for use in the determination of a VCI. The Quartz Crystal Microbalance (QCM) and an atmospheric corrosion monitor were used to characterize adsorption effects and corrosion monitoring of two commercially known inhibitors, sodium nitrite and dicyclohexylammonium nitrite on evaporated iron during atmospheric conditions. Two devices will be used for in situ measurements of adsorption, the QCM and an atmospheric corrosion monitor. During the adsorption process the QCM measures a frequency change that can be associated to a mass change due to adsorption of the inhibitor it is also capable of in situ monitoring corrosion rates of the substrate in a corrosive atmosphere. From experience and in theory the corrosion rate is expected to decrease due to the adsorption of the VCI. Which has been observed from in situ measurements using the QCM. The atmospheric corrosion monitor measures the resistance of oxides of a substrate due to corrosion in reference to a non-corrosive element. It is tested here to measure its sensitivity in comparison to the QCM and to characterize its response during the adsorption of a VCI.
- OSTI ID:
- 509456
- Report Number(s):
- CONF-970332-; TRN: IM9735%%330
- Resource Relation:
- Conference: Corrosion 97. 52. annual corrosion conference of the National Association of Corrosion Engineers: economics and performance - bridging the gap and NACExpo, New Orleans, LA (United States), 9-14 Mar 1997; Other Information: PBD: 1997; Related Information: Is Part Of Corrosion/97 conference papers; PB: [4584] p.
- Country of Publication:
- United States
- Language:
- English
Similar Records
Part 1. Conducting polymer: Experimental aspects of piezoelectric quartz crystal oscillator and electrodeposited polyvinylferrocene (PVF) film system. Part 2. Voltammetric studies of nitrate and nitrite ions at rotating silver disk and electrochemical quartz crystal microbalance electrodes
An investigation into the inhibition of different VCIs for the protection of aluminum 2024 in the presence of H{sub 2}S and SO{sub 2}