Evaluation of commercial coatings by electrochemical impedance spectroscopy
Book
·
OSTI ID:82968
- Chevron Petroleum Technology Co., La Habra, CA (United States)
Electrochemical Impedance Spectroscopy (EIS) was used to evaluate the performance of oilfield immersion coatings. The performance evaluation was conducted in aerated 3% sodium chloride solution by inducing a tiny pinhole onto the coating to accelerate the test. The results demonstrate that EIS is a feasible method for evaluating oilfield immersion coatings, because it can differentiate the performance among coatings and gives results which are in good agreement with conventional immersion tests. It was found that the frequency at maximum phase angle and the break point frequency are system-specific parameters and may be used as criteria for quality control of the coatings and to predict long-term coating performance.
- OSTI ID:
- 82968
- Report Number(s):
- CONF-940222--
- Country of Publication:
- United States
- Language:
- English
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