论文部分内容阅读
全国焊接标准化技术委员会于1993年10月在宜昌召开了《熔敷金属中扩散氢测定方法》标准修订审查会,经过代表们认真讨论修改,一致通过了标准报批稿.新标准基本上等效JIS和ISO现行测氢标准.现将主要改变部分介绍如下.(1)新标准除了保留甘油法外,根据国际上测氢发展趋势及我国超低氢焊条发展情况,增加了色谱法和水银法,并且标准中明确规定,当用甘油置换法测定的熔敷金属中的扩散氢含量小于2ml/100g时,必须使用气相色谱法测定.
National Welding Standardization Technical Committee held in Yichang in October 1993, “Review of Diffusion Hydrogen Determination of Deposited Metal” standard revision review meeting, after careful discussion and amendment by delegates, unanimously adopted the standard draft for approval. The new standard is basically equivalent to JIS And ISO current hydrogen measurement standards now introduce the main changes are as follows: (1) The new standard in addition to retain the glycerol law, according to the international development trend of hydrogen measurement and the development of ultra-low hydrogen electrode in our country, an increase of chromatography and mercury method, And the standard clearly stipulates that when the diffusion of hydrogen content of the deposited metal measured by glycerol displacement method is less than 2ml / 100g, it must be determined by gas chromatography.