Effects of Surface Treatment Conditions on the Bonding Strength and Electromagnetic Pulse Shielding of Concrete Using the 85Zn-15Al Arc Thermal Metal Spraying Method
The surface treatment of concrete enhances the bonding of its metal coatings. Therefore, in the present study, on the concrete surface, prior to the deposit of an 85Zn-15Al coating via an arc thermal spraying process, different surface treatments were considered for the effective electromagnetic pul...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2023-02-01
|
| Series: | Materials |
| Subjects: | |
| Online Access: | https://www.mdpi.com/1996-1944/16/4/1372 |
| _version_ | 1797619625792372736 |
|---|---|
| author | Jongmin Jang Kwangwoo Wi Han-Seung Lee Jitendra Kumar Singh Han-Hee Lee |
| author_facet | Jongmin Jang Kwangwoo Wi Han-Seung Lee Jitendra Kumar Singh Han-Hee Lee |
| author_sort | Jongmin Jang |
| collection | DOAJ |
| description | The surface treatment of concrete enhances the bonding of its metal coatings. Therefore, in the present study, on the concrete surface, prior to the deposit of an 85Zn-15Al coating via an arc thermal spraying process, different surface treatments were considered for the effective electromagnetic pulse (EMP) shielding properties of the concrete. However, the direct coating on a concrete surface possesses lower bond adhesion, therefore it is of the utmost importance to treat the concrete surface prior to the deposition of the metal coating. Moreover, to obtain better bond adhesion and fill the defects of the coating, the concrete surface is treated by applying a surface hardener (SH), as well as a surface roughening agent (SRA) and a sealing agent (SA), respectively. The metal spraying efficiency, adhesion performance, and bonding strength under different concrete surface treatment conditions were evaluated. The EMP shielding effect was evaluated under the optimal surface treatment condition. The proposed method for EMP shielding exhibited over 60% of spraying efficiency on the treated surface and a bonding strength of up to 3.9 MPa for the SH–SRA–SA (combining surface roughening and pores/defects filling agents) specimen compared to the control one, i.e., 0.8 MPa. The EMP shielding values of the surface-treated concrete with surface hardener, surface roughening agent, and sealing agent, i.e., SH–SRA–SA specimens, exhibited 96.6 dB at 1000 MHz. This was about 12 times higher than without coated concrete. |
| first_indexed | 2024-03-11T08:30:41Z |
| format | Article |
| id | doaj.art-abbe689d1a754e90b2cbc5b14d5108bc |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-11T08:30:41Z |
| publishDate | 2023-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-abbe689d1a754e90b2cbc5b14d5108bc2023-11-16T21:48:53ZengMDPI AGMaterials1996-19442023-02-01164137210.3390/ma16041372Effects of Surface Treatment Conditions on the Bonding Strength and Electromagnetic Pulse Shielding of Concrete Using the 85Zn-15Al Arc Thermal Metal Spraying MethodJongmin Jang0Kwangwoo Wi1Han-Seung Lee2Jitendra Kumar Singh3Han-Hee Lee4Department of Smart-City Engineering, Hanyang University, 1271 Sa 3-dong, Sangrok-gu, Ansan 15588, Republic of KoreaInnovative Durable Building and Infrastructure Research Center, Hanyang University, 1271 Sa 3-dong, Sangrok-gu, Ansan 15588, Republic of KoreaDepartment of Architectural Engineering, Hanyang University, 1271 Sa 3-dong, Sangrok-gu, Ansan 15588, Republic of KoreaInnovative Durable Building and Infrastructure Research Center, Center for Creative Convergence Education, Hanyang University, 1271 Sa-3-dong, Sangnok-gu, Ansan 15588, Republic of KoreaKorea Testing Laboratory, 723 Haean-ro, Sangnok-gu, Ansan 15588, Republic of KoreaThe surface treatment of concrete enhances the bonding of its metal coatings. Therefore, in the present study, on the concrete surface, prior to the deposit of an 85Zn-15Al coating via an arc thermal spraying process, different surface treatments were considered for the effective electromagnetic pulse (EMP) shielding properties of the concrete. However, the direct coating on a concrete surface possesses lower bond adhesion, therefore it is of the utmost importance to treat the concrete surface prior to the deposition of the metal coating. Moreover, to obtain better bond adhesion and fill the defects of the coating, the concrete surface is treated by applying a surface hardener (SH), as well as a surface roughening agent (SRA) and a sealing agent (SA), respectively. The metal spraying efficiency, adhesion performance, and bonding strength under different concrete surface treatment conditions were evaluated. The EMP shielding effect was evaluated under the optimal surface treatment condition. The proposed method for EMP shielding exhibited over 60% of spraying efficiency on the treated surface and a bonding strength of up to 3.9 MPa for the SH–SRA–SA (combining surface roughening and pores/defects filling agents) specimen compared to the control one, i.e., 0.8 MPa. The EMP shielding values of the surface-treated concrete with surface hardener, surface roughening agent, and sealing agent, i.e., SH–SRA–SA specimens, exhibited 96.6 dB at 1000 MHz. This was about 12 times higher than without coated concrete.https://www.mdpi.com/1996-1944/16/4/1372concreteelectromagnetic pulse shieldingarc thermal metal spraybonding strengthshielding effect |
| spellingShingle | Jongmin Jang Kwangwoo Wi Han-Seung Lee Jitendra Kumar Singh Han-Hee Lee Effects of Surface Treatment Conditions on the Bonding Strength and Electromagnetic Pulse Shielding of Concrete Using the 85Zn-15Al Arc Thermal Metal Spraying Method Materials concrete electromagnetic pulse shielding arc thermal metal spray bonding strength shielding effect |
| title | Effects of Surface Treatment Conditions on the Bonding Strength and Electromagnetic Pulse Shielding of Concrete Using the 85Zn-15Al Arc Thermal Metal Spraying Method |
| title_full | Effects of Surface Treatment Conditions on the Bonding Strength and Electromagnetic Pulse Shielding of Concrete Using the 85Zn-15Al Arc Thermal Metal Spraying Method |
| title_fullStr | Effects of Surface Treatment Conditions on the Bonding Strength and Electromagnetic Pulse Shielding of Concrete Using the 85Zn-15Al Arc Thermal Metal Spraying Method |
| title_full_unstemmed | Effects of Surface Treatment Conditions on the Bonding Strength and Electromagnetic Pulse Shielding of Concrete Using the 85Zn-15Al Arc Thermal Metal Spraying Method |
| title_short | Effects of Surface Treatment Conditions on the Bonding Strength and Electromagnetic Pulse Shielding of Concrete Using the 85Zn-15Al Arc Thermal Metal Spraying Method |
| title_sort | effects of surface treatment conditions on the bonding strength and electromagnetic pulse shielding of concrete using the 85zn 15al arc thermal metal spraying method |
| topic | concrete electromagnetic pulse shielding arc thermal metal spray bonding strength shielding effect |
| url | https://www.mdpi.com/1996-1944/16/4/1372 |
| work_keys_str_mv | AT jongminjang effectsofsurfacetreatmentconditionsonthebondingstrengthandelectromagneticpulseshieldingofconcreteusingthe85zn15alarcthermalmetalsprayingmethod AT kwangwoowi effectsofsurfacetreatmentconditionsonthebondingstrengthandelectromagneticpulseshieldingofconcreteusingthe85zn15alarcthermalmetalsprayingmethod AT hanseunglee effectsofsurfacetreatmentconditionsonthebondingstrengthandelectromagneticpulseshieldingofconcreteusingthe85zn15alarcthermalmetalsprayingmethod AT jitendrakumarsingh effectsofsurfacetreatmentconditionsonthebondingstrengthandelectromagneticpulseshieldingofconcreteusingthe85zn15alarcthermalmetalsprayingmethod AT hanheelee effectsofsurfacetreatmentconditionsonthebondingstrengthandelectromagneticpulseshieldingofconcreteusingthe85zn15alarcthermalmetalsprayingmethod |