Assessing the feasibility of laser ablation coating removal (LACR) on legacy bridge steel: Coating removal and adhesion, and effects on mechanical properties.
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| Title: | Assessing the feasibility of laser ablation coating removal (LACR) on legacy bridge steel: Coating removal and adhesion, and effects on mechanical properties. |
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| Authors: | Moffat, W. P.1 (AUTHOR) wpm6ju@virginia.edu, Sharp, S.2 (AUTHOR), Provines, J.2 (AUTHOR), Agnew, S. R.1 (AUTHOR), Fitz-Gerald, J. M.1 (AUTHOR) |
| Source: | Journal of Vacuum Science & Technology: Part A-Vacuums, Surfaces & Films. Mar2024, Vol. 42 Issue 2, p1-15. 15p. |
| Subjects: | Iron & steel bridges, Laser ablation, Protective coatings, Surface coatings, Hardness testing, Ferric oxide, Iron oxides |
| Abstract: | The application of protective organic coatings is one of the most effective and commonly used corrosion mitigation strategies. To maintain the protective nature of coatings on long-term-exposed surfaces such as steel bridge components, coatings must be periodically removed and reapplied. A relatively new method called laser ablation coating removal (LACR), which incorporates a high energy nanosecond pulsed laser beam in combination with a high efficiency filtration system, allows for safe and effective removal of coatings and contamination from metal surfaces. In this study, LACR cleaning is tested on legacy bridge steel components to investigate the effect on substrate cleanliness and steel mechanical properties. These bridge sections were never blasted and contain a 20–100 μm thick mill-scale layer (iron oxide) below several coating layers (including lead-rich coatings). The top micron of the oxide layer is melted by LACR and also thermally insulates the underlying steel and prevents any melting within the metallic substrate. The resulting surfaces are analyzed using microscopy, hardness testing, tensile, and fatigue testing, and it is shown that LACR does not cause any measurable detrimental effects to the bulk mechanical properties of the bridge steel, as well as effectively removes all paint coatings. Furthermore, adhesion testing on LACR-cleaned substrates shows excellent adhesion, qualifying above adhesion requirements for coated steel. [ABSTRACT FROM AUTHOR] |
| Copyright of Journal of Vacuum Science & Technology: Part A-Vacuums, Surfaces & Films is the property of American Institute of Physics and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
| FullText | Text: Availability: 0 |
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| Header | DbId: egs DbLabel: Engineering Source An: 175796192 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Assessing the feasibility of laser ablation coating removal (LACR) on legacy bridge steel: Coating removal and adhesion, and effects on mechanical properties. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Moffat%2C+W%2E+P%2E%22">Moffat, W. P.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> wpm6ju@virginia.edu</i><br /><searchLink fieldCode="AR" term="%22Sharp%2C+S%2E%22">Sharp, S.</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Provines%2C+J%2E%22">Provines, J.</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Agnew%2C+S%2E+R%2E%22">Agnew, S. R.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Fitz-Gerald%2C+J%2E+M%2E%22">Fitz-Gerald, J. M.</searchLink><relatesTo>1</relatesTo> (AUTHOR) – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Journal+of+Vacuum+Science+%26+Technology%3A+Part+A-Vacuums%2C+Surfaces+%26+Films%22">Journal of Vacuum Science & Technology: Part A-Vacuums, Surfaces & Films</searchLink>. Mar2024, Vol. 42 Issue 2, p1-15. 15p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Iron+%26+steel+bridges%22">Iron & steel bridges</searchLink><br /><searchLink fieldCode="DE" term="%22Laser+ablation%22">Laser ablation</searchLink><br /><searchLink fieldCode="DE" term="%22Protective+coatings%22">Protective coatings</searchLink><br /><searchLink fieldCode="DE" term="%22Surface+coatings%22">Surface coatings</searchLink><br /><searchLink fieldCode="DE" term="%22Hardness+testing%22">Hardness testing</searchLink><br /><searchLink fieldCode="DE" term="%22Ferric+oxide%22">Ferric oxide</searchLink><br /><searchLink fieldCode="DE" term="%22Iron+oxides%22">Iron oxides</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: The application of protective organic coatings is one of the most effective and commonly used corrosion mitigation strategies. To maintain the protective nature of coatings on long-term-exposed surfaces such as steel bridge components, coatings must be periodically removed and reapplied. A relatively new method called laser ablation coating removal (LACR), which incorporates a high energy nanosecond pulsed laser beam in combination with a high efficiency filtration system, allows for safe and effective removal of coatings and contamination from metal surfaces. In this study, LACR cleaning is tested on legacy bridge steel components to investigate the effect on substrate cleanliness and steel mechanical properties. These bridge sections were never blasted and contain a 20–100 μm thick mill-scale layer (iron oxide) below several coating layers (including lead-rich coatings). The top micron of the oxide layer is melted by LACR and also thermally insulates the underlying steel and prevents any melting within the metallic substrate. The resulting surfaces are analyzed using microscopy, hardness testing, tensile, and fatigue testing, and it is shown that LACR does not cause any measurable detrimental effects to the bulk mechanical properties of the bridge steel, as well as effectively removes all paint coatings. Furthermore, adhesion testing on LACR-cleaned substrates shows excellent adhesion, qualifying above adhesion requirements for coated steel. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Journal of Vacuum Science & Technology: Part A-Vacuums, Surfaces & Films is the property of American Institute of Physics and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1116/6.0003290 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 15 StartPage: 1 Subjects: – SubjectFull: Iron & steel bridges Type: general – SubjectFull: Laser ablation Type: general – SubjectFull: Protective coatings Type: general – SubjectFull: Surface coatings Type: general – SubjectFull: Hardness testing Type: general – SubjectFull: Ferric oxide Type: general – SubjectFull: Iron oxides Type: general Titles: – TitleFull: Assessing the feasibility of laser ablation coating removal (LACR) on legacy bridge steel: Coating removal and adhesion, and effects on mechanical properties. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Moffat, W. P. – PersonEntity: Name: NameFull: Sharp, S. – PersonEntity: Name: NameFull: Provines, J. – PersonEntity: Name: NameFull: Agnew, S. R. – PersonEntity: Name: NameFull: Fitz-Gerald, J. M. IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 03 Text: Mar2024 Type: published Y: 2024 Identifiers: – Type: issn-print Value: 07342101 Numbering: – Type: volume Value: 42 – Type: issue Value: 2 Titles: – TitleFull: Journal of Vacuum Science & Technology: Part A-Vacuums, Surfaces & Films Type: main |
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