Pacheco R P, Gomes J F, Miranda R M, Quintino M L
a UNIDEMI, Departamento de Engenharia Mecânica e Industrial, Faculdade de Ciências e Tecnologia, FCT , Universidade Nova de Lisboa , Caparica , Portugal.
b CERENA, Centro de Recursos Naturais e Ambiente/Instituto Superior Técnico , Universidade de Lisboa , Lisboa , Portugal.
Inhal Toxicol. 2017 May;29(6):282-289. doi: 10.1080/08958378.2017.1358778. Epub 2017 Aug 14.
The primary objective of this study was to correlate the emission of macro and nanoparticles released during the process of metal inert gas/metal active gas (MIG/MAG) of stainless steel with different gas mixtures. Using different gas mixtures with different heat inputs, it was possible to determine fume formation rates and surface areas of nanoparticles with alveolar lung deposition capacity. It was found, how the various transfer modes and the type of gas protection, in particular, the percentage of active elements in the chemical composition of the gas, affect the amount of fumes generated and also the generation of nanoparticles with a high capacity of deposition. The spray transfer mode always shows higher values of nanoparticles surface area, unlike the fume formation rates. Among the tested mixtures 82%Ar + 18%CO generates higher emissions of nanoparticles as well as fume formation rates.
本研究的主要目的是将不锈钢在金属惰性气体/金属活性气体（MIG/MAG）过程中释放的宏观和纳米颗粒排放与不同气体混合物相关联。使用具有不同热输入的不同气体混合物，可以确定具有肺泡肺沉积能力的纳米颗粒的烟雾形成速率和表面积。研究发现，各种传输模式和气体保护类型，特别是气体化学成分中活性元素的百分比，如何影响产生的烟雾量以及具有高沉积能力的纳米颗粒的产生。与烟雾形成速率不同，喷射传输模式总是显示出更高的纳米颗粒表面积值。在测试的混合物中，82%Ar + 18%CO产生更高的纳米颗粒排放以及烟雾形成速率。
