Multicomponent condensation in the plasma of welding fumes

被引:10
作者
Vishnyakov, V. I. [1 ]
Kiro, S. A. [1 ]
Ennan, A. A. [1 ]
机构
[1] Natl Acad Sci Ukraine, Phys Chem Inst Environm & Human Protect, UA-65082 Odessa, Ukraine
关键词
Thermal plasma; Welding fume; Multicomponent nucleation; Coalescence; Primary particles; Multi-modal distribution; SIZE DISTRIBUTION; PRIMARY PARTICLES; AEROSOLS; METAL;
D O I
10.1016/j.jaerosci.2014.04.003
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
The subject of study is the multicomponent condensation in the low-temperature plasma, which forms when shielded metal arc welding is applied. The modeling of heterogeneous ion-induced nucleation and nuclei growth in the strongly ionized environment with account of their coagulation is performed. The formation of the bimodal size distribution of the liquid particles after start of nucleation of the predominant component (iron) is demonstrated. This distribution consists of the nano-sized mode of nuclei and the larger-sized mode of the aggregated droplets. The condensation of the accompanying low-boiling components on these droplets causes the termination of nucleation earlier than conditions for the condensation growth of the equilibrium nuclei arise. Therefore, the growth of the nuclei occurs only by their coalescence. The deposition of the accompanying components on the iron nuclei leads to replacement of the iron by these components in the particles of the nuclei mode. (C) 2014 Elsevier Ltd. All rights reserved.
引用
收藏
页码:1 / 10
页数:10
相关论文
共 29 条
[1]   Physicochemical characterisation of different welding aerosols [J].
Berlinger, B. ;
Benker, N. ;
Weinbruch, S. ;
L'Vov, B. ;
Ebert, M. ;
Koch, W. ;
Ellingsen, D. G. ;
Thomassen, Y. .
ANALYTICAL AND BIOANALYTICAL CHEMISTRY, 2011, 399 (05) :1773-1780
[2]   Direct quadrature method of moments for the exhaust particle formation and evolution in the wake of the studied ground vehicle [J].
Chan, T. L. ;
Liu, Y. H. ;
Chan, C. K. .
JOURNAL OF AEROSOL SCIENCE, 2010, 41 (06) :553-568
[3]   A two-dimensional nodal model with turbulent effects for the synthesis of Si nano-particles by inductively coupled thermal plasmas [J].
Colombo, V. ;
Ghedini, E. ;
Gherardi, M. ;
Sanibondi, P. ;
Shigeta, M. .
PLASMA SOURCES SCIENCE & TECHNOLOGY, 2012, 21 (02)
[4]   Solving the coagulation equation by the moments method [J].
Estrada, P. R. ;
Cuzzi, J. N. .
ASTROPHYSICAL JOURNAL, 2008, 682 (01) :515-526
[5]  
Evans DM, 1998, WELD J, V77, p53S
[6]  
HEWETT P, 1995, AM IND HYG ASSOC J, V56, P136, DOI 10.1202/0002-8894(1995)056<0136:EORPDA>2.0.CO
[7]  
2
[8]  
Hinds W.C., 1999, AEROSOL TECHNOLOGY, DOI DOI 10.1016/0048-9697(83)90099-2
[9]   Surfactant - Dispersion of metal oxide fume particles [J].
Jenkins, NT ;
Adelman, S ;
Eagar, TW .
AEROSOL SCIENCE AND TECHNOLOGY, 2005, 39 (02) :170-172
[10]  
Jenkins NT, 2005, WELD J, V84, p156S