轻烃中硫化物测定方法及其对金属腐蚀性的影响

现有测定石油产品中硫化物的方法包括GB/T 380燃灯法、微库仑法（电量法）、紫外荧光法、X射线光谱法等，其中紫外荧光法和X射线光谱法或将成为主流检测方法。传统的化学分离、分析测定硫形态的方法，正在逐步被更高效的气相色谱-硫选择性检测方法所替代。不同形态的硫化物对产品的金属腐蚀性能影响不同，其中硫化氢及元素硫对金属银和铜有强腐蚀性；硫醇及有机酸会增强单质硫的腐蚀程度；其他形态的烃基含硫化合物对金属腐蚀性能基本没有影响。

DETERNINATION METHOD OF SULFUR COMPOUNDS IN LIGHT HYDROCARBON AND ITS EFFECT ON METAL CORROSION

The lamp method, microcoulometry method, ultraviolet fluorescence method, and X-ray fluorescence spectrometry method are commonly used for determination of sulfur compounds in light hydrocarbon oil. Ultraviolet fluorescence and X-ray fluorescence spectrometry methods will dominate in the future, the traditional chemical isolation and analysis methods gradually being replaced by more effective means-gas chromatography-sulfur selective detection method. Different forms of sulfides have different corrosion properties on metal products. Hydrogen sulfide and elemental sulfur showed strong corrosion to Silver and Copper stip. Thiols and organic acids can enhance the corrosion degree of elemental sulfur. Other forms of alkylated sulfur compounds have little effect on the corrosion of metals.