Effect Of Dynamic Characteristics of Power Supplies on Aerosol Composition While Welding With Coated Electrodes

Il’yaschenko, Dmitriy P.; Chinakhov, D. A.; Sadikov, I D

doi:10.1088/1757-899x/142/1/012007

Cited by 3 publications

(2 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Table 2 shows the elemental composition of the PM 10 fraction of WF particles for zone-1 (oxygen by stoichiometry (normalized)). In a previous study, it was reported that the metal cations fraction of PM 10 were approximately 21.1-29.9 wt% Fe, 3.4-5.7 wt% Mn, 2.4-8.9 wt% K, and 1.0-1.2 wt% Ti (Table 2), which was in line with other published reports [12], [28] [31]. Also, a clear size dependence of PM 10 chemical composition was observed for the manual arc welding: nano and sub-microparticles were mostly metal oxides and unoxidized metals in contrast to microparticles which contained more volatile elements and compounds (e.g.…”

Section: Resultssupporting

confidence: 91%

“…The difference in the weight of the lters before and after the air sampling procedure corresponded to the precipitated mass of the PM 10 fraction of WFs. The calculation of the concentration of the PM 10 fraction (mg/m 3 •hour − 1 ) was based on the data on precipitated WF mass (mg) from the blown air volume (2.3 m 3 ) per hour of the sampler operation [31].…”

Section: Sampling Methods For the Wf Particles Within The Space Of Th...mentioning

confidence: 99%

See 1 more Smart Citation

Features of fume distribution in the working zone during arc welding operations with various covered electrodes

Kirichenko,

Stratidakis,

Kholodov

et al. 2024

Preprint

View full text Add to dashboard Cite

Particles in welding fumes (WFs) generated through arc welding operations pose serious health concerns to the welders through their exposure to heavy metals. In this study, the influence of different covering types of industrial electrodes (rutile, basic, acid, rutile-cellulose) on the particle size distribution, morphology, and elemental composition of particles of welding fumes was investigated. Quantitative analysis was conducted in order to determine the distribution of particles with diameters of 10μm, or less, (PM10 fraction) of the WFs within the workplace, followed by the comparison of the results with the current international normative documents on the maximum permissible concentration of the PM10 fraction in the working zone air. The most hazardous types of electrode coverings were determined based on the dispersion, chemical composition, and concentration of formed particles of the PM10 fraction in space and time. The dependence of the particle size distribution time of the WFs in the working zone was identified for a basic covered industrial electrode. The maximum sizes of WF particles were reported for operations held at 100 A with electrodes having the rutile-cellulose type of covering, and at 150 A having the basic type of covering. A concentration of 0.05 mg/m3 for the PM10 fraction of WFs in the workplace was achieved after 1 hour of the welding machine operation at a current equal to 100 A. Thus, the results of the characterization of WFs demonstrate the risks of the arc welding process to human health and stress the need for their control and mitigation. According to the results of the study, a proportional relationship between the average particle diameter and the WF particle distribution period in the workplace has been demonstrated, which has been particularly evident from the height of the WF particles. 3D modeling of the dispersion of WF particles during welding arc operations proved to be a suitable method for their characterization.

show abstract

Section: Resultssupporting

confidence: 91%

Section: Sampling Methods For the Wf Particles Within The Space Of Th...mentioning

confidence: 99%

Features of fume distribution in the working zone during arc welding operations with various covered electrodes

Kirichenko,

Stratidakis,

Kholodov

et al. 2024

Preprint

View full text Add to dashboard Cite

show abstract

Peculiarities of influence of welding aerosols on the respiratory system

Kashuba¹

2021

Ukr. ž. probl. med. pr.

View full text Add to dashboard Cite

Introduction. Respiratory diseases of electric welders are a common occupational disease. The cause of these diseases is associated with the effects of welding aerosols on the respiratory system. One of the important properties of aerosols, on which depends the peculiarity of their effect on the respiratory system, is their dispersion. Therefore, the study of the dispersed composition of welding aerosols entering the respiratory system is an important point for understanding the peculiarities of the formation of pneumoconiosis. Purpose of research. To investigate the aerodynamic features of welding aerosols and their permeability to the respiratory system. Materials and methods of research. The particle size of welded aerosols was studied by means of optical and electron microscopy. Sampling from the air of the working area was carried out with the patented «Method of determining dust air pollution in the premises». Sampling of inhaled and exhaled aerosol was performed with the device for determining the absorbed dose of aerosol. Results. Dust particles of different sizes both in quantitative terms and by weight are distributed on separate sites of respiratory organs as follows. Fractions up to 0.5 μm in size are mostly represented in the alveoli, fractions from 0.5 to 8.6 μm in size are mostly delayed in the larynx, trachea, bronchi, and particles larger than 8.6 μm are found in the mouth cavity and nasopharynx. Aerosol fractions with a sedimentation radius (Rs) of 10.4-12.3 μm make up the largest part of the total mass of dust deposited in the oral cavity and pharynx, fractions with Rs of 4.6-6.5 μm -in the larynx, trachea, bronchi, and fractions with Rs 0.3-0.6 μm -in the alveoli. Conclusions. Under conditions of use in the production of air recirculation system, the total weight concentrations of the welding aerosol do not reflect the actual effect of dust on the respiratory system. It would be more correct under these conditions to evaluate the effect of the aerosol on the respiratory system by the size of its respirable fraction.

show abstract

Influence of Composition of Binder of Electrodes Coating on Cytotoxicity of Welding Aerosols

Levchenko

Lukianenko

Demetska

et al. 2018

MSF

View full text Add to dashboard Cite

The results of investigations of the levels of evolution, chemical composition and cytotoxicity of harmful substances evolved during welding by chromium-nickel high-alloy electrodes are presented in order to improve their sanitary-hygienic characteristics. It is shown that in order to create new grades of welding electrodes with the improved hygienic characteristics, it is necessary to possess not only the data of initial sanitary-hygienic evaluation, but also to have the results of biological investigations of WA toxicity. It was established that the application of a binder based on pure lithium or lithium-sodium potassium liquid glass in the electrodes coating instead of potassium-sodium allows reducing the level of evolution of welding aerosol into air, decreasing the content of highly-toxic hexavalent chromium in it and, therefore, its general toxicity.

show abstract

Effect Of Dynamic Characteristics of Power Supplies on Aerosol Composition While Welding With Coated Electrodes

Cited by 3 publications

References 1 publication

Features of fume distribution in the working zone during arc welding operations with various covered electrodes

Features of fume distribution in the working zone during arc welding operations with various covered electrodes

Peculiarities of influence of welding aerosols on the respiratory system

Influence of Composition of Binder of Electrodes Coating on Cytotoxicity of Welding Aerosols

Contact Info

Product

Resources

About