Coating of the internal surface with a ceramic layer is useful for preventing the formation of deposits and extending the lifetime of the tubes, preventing the economic and operational issues derived from the carbon deposition on the surface of stainless steel tubes in the chemical industry. The thermal degradation of dimethyl ether (DME) at 700 °C has been used as reaction test to compare the carbon deposition on standard and coated tubes. The results indicate an outstanding decrease in the amount of deposited carbon on the coated tubes, as well as the possibility of operating at longer times since the carbon deposits are only formed at the very beginning of the tests. The reversibility of the formation and combustion of the carbon deposits is proved for the coated tube, so that reproducible results have been attained in different cycles, which is not possible with a conventional uncoated stainless-steel tube.

Subject
Coatings, Materials, Degradation, Thermal degradation, Tubes, Tube samples, Carbon monoxide, Deposition rate, Scale formation, Ceramics, Carbon, Gases, Deposit corrosion
Keywords:
coating, coated tubes
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2019
Association for Materials Protection and Performance (AMPP)
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