本工作采用自行研制的H_2S-H_2还原性气氛实验装置进行了纯硫化实验方法验证及可靠性研究。在所控制的流量(H_2S-H_2气总流量小于600ml/min)下,H_2+1/2O_2=H_2O及H_2S=H_2+1/2S_2两个反应达到平衡,从而使试样位置的氧压非常低,以保证试样只发生硫化。通过调节H_2S和H_2的流量可使硫压在10~(-2)atm～10~(-10)atm范围内随意控制。实验结果证实试样的腐蚀产物为纯硫化物,无氧化物形成,说明以此方法研究纯硫化是可行的和可靠的。
An experimental technique of pure sulphidation in reducing H_2S-H_2 environment has been investigated. Equilibrium of two reactions H_2+1/2O_2=H_2O and H_2S=H_2+1/12S_2 can be reached by the apparatus employed through ceful control of the flow rate, i. e. the total flow rate of H_2S plus H_2 is kept lower than 60Oral/min. Under such a condition, oxygen partial pressure at the sample is very low. While the sulphur partial pressure can be accurately controlled within the range of 10~(-2) atm-10~(-10) atm by carefully regulating and controlling the flow rates of H_2S and H_2 respectively. Experiments demostrate that corrosion products are pure sulphides without oxides. It is feasible and reliable to study sulphidation by this technique.
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