期刊名称：International Journal of Innovative Research in Science, Engineering and Technology
印刷版ISSN：2347-6710
电子版ISSN：2319-8753
出版年度：2016
卷号：5
期号：5
页码：8828
DOI：10.15680/IJIRSET.2016.0505315
出版社：S&S Publications
摘要：In all welding processes, air pollutants are created in the form of fumes and gases. The fume consists mainlyof metal oxides and is formed when metal vapour condenses and oxidizes. Gases are created due to the hightemperature and ultraviolet radiation from the arc. Examples of hazardous gases formed in welding include ozone,nitrogen dioxide, nitric oxide and carbon mono-oxide. The level of emission of air pollutants and their compositiondepends on a number of different factors such as; welding method used, welding parameters, filler metal and surfacecoatings or contaminants on the base metal surface. Air pollutants have different effects on man. In order to evaluatethe hazards, many substances have hygienic threshold values. These values can be used in assessing the quality of thebreathing air. By taking a number of different precautions, the welder’s occupational health can be improved in manyways.Where there is a likelihood of worker exposure to welding fumes and gases, the following controls are used inday to day operations :i. Engineering controls;ii. Administrative controls; andiii. Use of Personal Protective Equipment.In this paper we try to make an effort to change the design of welding electrodes in such a way Manufacturers ofwelding electrodes may be able to substitute less hazardous or modify composition of ingredients and using the purestform of chromium in their products without altering important metallurgical or welding characteristics and mechanicalproperties.This paper concludes reduced toxicity up to 37.5% & 14.28% of Cr&Ni respectively in the fumes and gasesgenerated by modifying composition which also fulfils all the necessary requirements of ASME section II part-A codeSA240 for SS304 plate welding.
