Influence of Laser Treatment on the Corrosion Resistance of Cr<sub>3</sub>C<sub>2</sub>-25(Ni20Cr) Cermet Coating
The influence of the laser treatment on the corrosion resistance of the Cr<sub>3</sub>C<sub>2</sub>-25(Ni20Cr) cermet coating on the Al7075 (EN, AW-7075) substrate (Cr<sub>3</sub>C<sub>2</sub>-25(Ni20Cr)/Al7075) was investigated. The coating was produc...
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MDPI AG
2021-07-01
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| Online Access: | https://www.mdpi.com/1996-1944/14/15/4078 |
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| author | Mieczyslaw Scendo Wojciech Zorawski Katarzyna Staszewska-Samson Anna Goral |
| author_facet | Mieczyslaw Scendo Wojciech Zorawski Katarzyna Staszewska-Samson Anna Goral |
| author_sort | Mieczyslaw Scendo |
| collection | DOAJ |
| description | The influence of the laser treatment on the corrosion resistance of the Cr<sub>3</sub>C<sub>2</sub>-25(Ni20Cr) cermet coating on the Al7075 (EN, AW-7075) substrate (Cr<sub>3</sub>C<sub>2</sub>-25(Ni20Cr)/Al7075) was investigated. The coating was produced by the cold sprayed (CS) method. The tested coatings were irradiated with a laser spot speed of 600 mm/min, 800 mm/min, and 1000 mm/min. The mechanical properties of the Cr<sub>3</sub>C<sub>2</sub>-25(Ni20Cr)/Al7075 were characterized by microhardness (HV) measurements. The surface and microstructure of the specimens were observed by ascanning electron microscope (SEM) and other assistive techniques. The corrosion test of materials wascarried out by using the electrochemical method in the acidic chloride solution. Cermet coatings perfectly protect the Al7075 substrate against contact with an aggressive corrosion environment. The laser remelting process of the Cr<sub>3</sub>C<sub>2</sub>-25(Ni20Cr) layer caused the homogenization of the structure cermet coatings. The irradiation with the laser beam eliminates microcracks and pores on the Cr<sub>3</sub>C<sub>2</sub>-25(Ni20Cr) surface. However, the best effect of improving the anti-corrosion properties of cermet coating was obtained for the lowest laser spot speed (i.e., 600 mm/min). It was found that the corrosion rate of the Cr<sub>3</sub>C<sub>2</sub>-25(Ni20Cr) cermet coating was reduced by more than two times compared to the highest speed of the laser spot. |
| first_indexed | 2024-03-10T09:12:43Z |
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| id | doaj.art-18cd8c999a854e3d81b03e04c9890e15 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-10T09:12:43Z |
| publishDate | 2021-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-18cd8c999a854e3d81b03e04c9890e152023-11-22T05:51:24ZengMDPI AGMaterials1996-19442021-07-011415407810.3390/ma14154078Influence of Laser Treatment on the Corrosion Resistance of Cr<sub>3</sub>C<sub>2</sub>-25(Ni20Cr) Cermet CoatingMieczyslaw Scendo0Wojciech Zorawski1Katarzyna Staszewska-Samson2Anna Goral3Institute of Chemistry, Jan Kochanowski University of Kielce, PL-25406 Kielce, PolandFaculty of Mechatronics and Mechanical Engineering, Kielce University of Technology, PL-25314 Kielce, PolandInstitute of Chemistry, Jan Kochanowski University of Kielce, PL-25406 Kielce, PolandInstitute of Metallurgy and Materials Science Polish Academy of Sciences, PL-30059 Krakow, PolandThe influence of the laser treatment on the corrosion resistance of the Cr<sub>3</sub>C<sub>2</sub>-25(Ni20Cr) cermet coating on the Al7075 (EN, AW-7075) substrate (Cr<sub>3</sub>C<sub>2</sub>-25(Ni20Cr)/Al7075) was investigated. The coating was produced by the cold sprayed (CS) method. The tested coatings were irradiated with a laser spot speed of 600 mm/min, 800 mm/min, and 1000 mm/min. The mechanical properties of the Cr<sub>3</sub>C<sub>2</sub>-25(Ni20Cr)/Al7075 were characterized by microhardness (HV) measurements. The surface and microstructure of the specimens were observed by ascanning electron microscope (SEM) and other assistive techniques. The corrosion test of materials wascarried out by using the electrochemical method in the acidic chloride solution. Cermet coatings perfectly protect the Al7075 substrate against contact with an aggressive corrosion environment. The laser remelting process of the Cr<sub>3</sub>C<sub>2</sub>-25(Ni20Cr) layer caused the homogenization of the structure cermet coatings. The irradiation with the laser beam eliminates microcracks and pores on the Cr<sub>3</sub>C<sub>2</sub>-25(Ni20Cr) surface. However, the best effect of improving the anti-corrosion properties of cermet coating was obtained for the lowest laser spot speed (i.e., 600 mm/min). It was found that the corrosion rate of the Cr<sub>3</sub>C<sub>2</sub>-25(Ni20Cr) cermet coating was reduced by more than two times compared to the highest speed of the laser spot.https://www.mdpi.com/1996-1944/14/15/4078Al7075 alloycold spraylaser spotcermet coatingcorrosion test |
| spellingShingle | Mieczyslaw Scendo Wojciech Zorawski Katarzyna Staszewska-Samson Anna Goral Influence of Laser Treatment on the Corrosion Resistance of Cr<sub>3</sub>C<sub>2</sub>-25(Ni20Cr) Cermet Coating Materials Al7075 alloy cold spray laser spot cermet coating corrosion test |
| title | Influence of Laser Treatment on the Corrosion Resistance of Cr<sub>3</sub>C<sub>2</sub>-25(Ni20Cr) Cermet Coating |
| title_full | Influence of Laser Treatment on the Corrosion Resistance of Cr<sub>3</sub>C<sub>2</sub>-25(Ni20Cr) Cermet Coating |
| title_fullStr | Influence of Laser Treatment on the Corrosion Resistance of Cr<sub>3</sub>C<sub>2</sub>-25(Ni20Cr) Cermet Coating |
| title_full_unstemmed | Influence of Laser Treatment on the Corrosion Resistance of Cr<sub>3</sub>C<sub>2</sub>-25(Ni20Cr) Cermet Coating |
| title_short | Influence of Laser Treatment on the Corrosion Resistance of Cr<sub>3</sub>C<sub>2</sub>-25(Ni20Cr) Cermet Coating |
| title_sort | influence of laser treatment on the corrosion resistance of cr sub 3 sub c sub 2 sub 25 ni20cr cermet coating |
| topic | Al7075 alloy cold spray laser spot cermet coating corrosion test |
| url | https://www.mdpi.com/1996-1944/14/15/4078 |
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