Coating adhesion of a chromate-containing epoxy primer on Al2024-T3 surface processed by laser-interference

Sabau, Adrian; Jun, Jiheon; Mcclurg, Dana

doi:10.1016/j.ijadhadh.2020.102641

Title: Coating adhesion of a chromate-containing epoxy primer on Al2024-T3 surface processed by laser-interference

Abstract

In this work, the coating adhesion test results are presented for a primer that was coated on laser-interference structured surfaces of as-received Al2024-T3 specimens, i.e., without employing any polishing, cleaning, or any other surface alteration techniques. All of the laser-interference processing was performed by splitting the primary beam of a Q-switched Nd:YAG pulsed nanosecond laser into two beams and focused them to the same spot. The specimens were spray painted with a chromate-containing epoxy primer, CA7233, compliant to MIL-PRF-23377 Type I Class C2 specification. The adhesion of primer on Al surface with different treatments was assessed using the ASTM D3359 X-cut and cross-hatch tests. It was found that the laser processed specimens meet the performance requirements in the coating adhesion specifications by having a higher or identical ranking for coating adhesion specimens than those prepared with current state-of-the-art chemical conversion or sulfuric acid anodizing. The rastering with either 4 mm/s or 6 mm/s with a laser fluence of 1.78 J/cm2 is recommended to attain acceptable coating adhesion, even higher than that with the anodizing surface treatment.These results indicate that laser-interference shows significant potential as a non-chemical surface preparation technique for these coatings.

Authors:

^[1];

^[1]; Mcclurg, Dana ^[1]

Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

Publication Date:: Tue May 19 00:00:00 EDT 2020

Research Org.:: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

Sponsoring Org.:: USDOE National Nuclear Security Administration (NNSA)

OSTI Identifier:: 1649511

Alternate Identifier(s):: OSTI ID: 1631192

Grant/Contract Number:: AC05-00OR22725

Resource Type:: Accepted Manuscript

Journal Name:: International Journal of Adhesion and Adhesives

Additional Journal Information:: Journal Volume: 102; Journal Issue: N/A; Journal ID: ISSN 0143-7496

Publisher:: Elsevier

Country of Publication:: United States

Language:: English

Subject:: 36 MATERIALS SCIENCE; Primers and coupling agents (A); Aluminium and alloys (B); Adhesion by mechanical interlocking (D); Laser

Citation Formats


                    Sabau, Adrian, Jun, Jiheon, and Mcclurg, Dana. Coating adhesion of a chromate-containing epoxy primer on Al2024-T3 surface processed by laser-interference.  United States: N. p., 2020. 
Web.  doi:10.1016/j.ijadhadh.2020.102641.

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                    Sabau, Adrian, Jun, Jiheon, & Mcclurg, Dana. Coating adhesion of a chromate-containing epoxy primer on Al2024-T3 surface processed by laser-interference.  United States.  https://doi.org/10.1016/j.ijadhadh.2020.102641

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                    Sabau, Adrian, Jun, Jiheon, and Mcclurg, Dana. Tue .  
"Coating adhesion of a chromate-containing epoxy primer on Al2024-T3 surface processed by laser-interference".  United States.  https://doi.org/10.1016/j.ijadhadh.2020.102641.  https://www.osti.gov/servlets/purl/1649511.

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@article{osti_1649511,

  title        = {Coating adhesion of a chromate-containing epoxy primer on Al2024-T3 surface processed by laser-interference},

  author       = {Sabau, Adrian and Jun, Jiheon and Mcclurg, Dana},

  abstractNote = {In this work, the coating adhesion test results are presented for a primer that was coated on laser-interference structured surfaces of as-received Al2024-T3 specimens, i.e., without employing any polishing, cleaning, or any other surface alteration techniques. All of the laser-interference processing was performed by splitting the primary beam of a Q-switched Nd:YAG pulsed nanosecond laser into two beams and focused them to the same spot. The specimens were spray painted with a chromate-containing epoxy primer, CA7233, compliant to MIL-PRF-23377 Type I Class C2 specification. The adhesion of primer on Al surface with different treatments was assessed using the ASTM D3359 X-cut and cross-hatch tests. It was found that the laser processed specimens meet the performance requirements in the coating adhesion specifications by having a higher or identical ranking for coating adhesion specimens than those prepared with current state-of-the-art chemical conversion or sulfuric acid anodizing. The rastering with either 4 mm/s or 6 mm/s with a laser fluence of 1.78 J/cm2 is recommended to attain acceptable coating adhesion, even higher than that with the anodizing surface treatment.These results indicate that laser-interference shows significant potential as a non-chemical surface preparation technique for these coatings.},

  doi          = {10.1016/j.ijadhadh.2020.102641},

  journal      = {International Journal of Adhesion and Adhesives},

  number       = N/A,

  volume       = 102,

  place        = {United States},

  year         = {Tue May 19 00:00:00 EDT 2020},

  month        = {Tue May 19 00:00:00 EDT 2020}

}

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Works referenced in this record:

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Similar Records

Title: Coating adhesion of a chromate-containing epoxy primer on Al2024-T3 surface processed by laser-interference

Abstract

Citation Formats

Nucleation and Growth of a Chromate Conversion Coating on Aluminum Alloy AA 2024-T3 journal, January 2001

Anodic oxidation of aluminium in sulphuric acid containing aluminium sulphate or magnesium sulphate journal, January 1983

Postsealing Changes in Porous Aluminum Oxide Films Obtained in Sulfuric Acid Solutions journal, January 2000

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Surface chemistry and composition-induced variation of laser interference-based surface treatment of Al alloys journal, September 2019

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Nucleation and Growth of a Chromate Conversion Coating on Aluminum Alloy AA 2024-T3
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Anodic oxidation of aluminium in sulphuric acid containing aluminium sulphate or magnesium sulphate
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Postsealing Changes in Porous Aluminum Oxide Films Obtained in Sulfuric Acid Solutions
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Formation of a cerium-based conversion coating on AA2024: relationship with the microstructure
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Initial investigation into the effectiveness of CO₂-laser treatment of aluminium for adhesive bonding
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Surface analytical characterisation of Nd:YAG-laser pre-treated Al Mg3 as a preparation for bonding
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Periodical micro-nano-structuring of metallic surfaces by interfering laser beams
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Surface chemistry and composition-induced variation of laser interference-based surface treatment of Al alloys
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