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Effect of the welding environment and storage time of electrodes on the diffusible hydrogen content in deposited metal
Abstract
In the study the glycerin displacement method was used for determination of diffusible hydrogen content in deposited metal. Specimens were welded in the air and in the water with covered rutile electrodes. The first part of the specimens was made immediately after opening the package of the electrodes. The electrodes were then stored in opened packages in laboratory conditions that allowed for contact with the air for three years. After that time, the second part of the samples was made. The results of the measurements of the diffusible hydrogen amount in deposited metal ranged from 32.61 to 39.95 ml/100 g for specimens welded in the air and from 51.50 to 61.34 ml/100 g for specimens made in the water. The statistical analyses were performed in a Statistical software package using the ANOVA module (one-way analysis of variance) with an assumed significance level α = 0.05. The assumption of normality was verified by the Shapiro-Wilk test. The homogeneity of variance was verified by the Levene test. In the next step, post-hoc analyzes were made. The aim was to determine which averages are significantly different. Scheffe, Tukey, NIR Fisher, Newman-Keuls and Duncan tests were used. Possible changes in the diffusible hydrogen content in deposited metal resulting from storage time of electrodes (3 years) were verified by Student’s t-test. All of the statistical analysis shows that the storage time of the electrodes has no significant influence on the diffusible hydrogen content in deposited metal regardless of the welding environment.
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- Accepted or Published Version
- DOI:
- Digital Object Identifier (open in new tab) 10.3989/revmetalm.140
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- Category:
- Articles
- Type:
- artykuł w czasopiśmie wyróżnionym w JCR
- Published in:
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REVISTA DE METALURGIA
no. 55,
ISSN: 0034-8570 - Language:
- English
- Publication year:
- 2019
- Bibliographic description:
- Tomków J., Fydrych D., Rogalski G., Łabanowski J.: Effect of the welding environment and storage time of electrodes on the diffusible hydrogen content in deposited metal// REVISTA DE METALURGIA. -Vol. 55, iss. 1 (2019), s.e140-
- DOI:
- Digital Object Identifier (open in new tab) 10.3989/revmetalm.140
- Verified by:
- Gdańsk University of Technology
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