Device for coupling thermogravimetric analyses and acoustic...

Details Device for coupling thermogravimetric analyses and acoustic... Device for coupling thermogravimetric analyses and acoustic...

2007-07-24

2007-07-24

Williams, Hezron (Department: 2856)

Measuring and testing

Embrittlement or erosion

C073S865600, C073S587000, C436S006000, C422S053000

Reexamination Certificate

active

11207943

ABSTRACT:
The present invention relates to a device comprising a thermobalance equipped with a detector (5) for measuring acoustic signals emitted by a sample (6) hanging from the balance beam and a preamplifier (2) incorporated in the vicinity of the head of the balance. The invention allows gas phase kinetic study of the degradation of materials and of depositions on these materials under temperature (100 to 1400° C.). In particular, corrosion phenomena such as: oxidation, sulfurization, carbonizing, metal dusting, nitriding, hydridation, chlorination, molten salt attack, and combinations of these degradations. Besides, deposits on the materials can be due to coking phenomena (carbon deposits), deposition of molten salts, volatile compounds condensation. The invention allows evaluation of the efficiency of inhibitors against corrosion and deposition processes.

REFERENCES:
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patent: 5526689 (1996-06-01), Coulter et al.
patent: 6057516 (2000-05-01), Nakamura et al.
patent: 2003/0019328 (2003-01-01), Dunmead et al.
patent: 44 44 944 (1996-06-01), None
Baldev Raj et al., “Acoustic Emission Studies Towards Better Understanding of High Temperature Oxidation In Cr-Mo Steels”, International Journal Of Pressure Vessels and Piping UK, vol. 45, No. 3, 1991, pp. 301-326.

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