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Citation: Yao Daping*, Chen Wenxiu. THE GAS CHROMATOGRAPH STUDY OF EVOLUTION HYDROGEN RATE CONSTANT AND ACTIVATION ENERGY OF TRAP IN METAL[J]. Acta Physico-Chimica Sinica, ;1989, 5(03): 377-380. doi: 10.3866/PKU.WHXB19890324 shu

THE GAS CHROMATOGRAPH STUDY OF EVOLUTION HYDROGEN RATE CONSTANT AND ACTIVATION ENERGY OF TRAP IN METAL

Yao Daping* ,
Chen Wenxiu

1.
Institute of Metal Research; Academia Sinica

Received Date: 29 September 1987
Available Online: 15 June 1989

The kinetic parameters of grain boundary and precipitate interface in 18 Ni maraging steel were studied by gas chromatograph as hydrogen detctor. The evolution rate peaks of grain boundary and precipitate interface appeared at 378 K and 405 K with 3.00 K min~(-1) heating rate and 0.55mm specimen thickness. The trapactivation energies needed to escape from these sites were obtained from the relationship between peak temperature and heating rate to be 14.2 kJ mol~(-1) and 23.1 kJ mo1~(-1), respectively. The rate constants of hydrogen evolution from these were 3.39 exp (-14.2/RT) min~(-1) and 26.34 exp(-23.1/RT) min~(-1), respectively.
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