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Evaluation of Substrates of Al-Mg and Aluminized Steel Coated With Non-Stick Fluoropolymers after the Removal of the Coating

Department of Mechanical Engineering, University of Cordoba, Medina Azahara Avenue 5, 14071 Cordoba, Spain
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Materials 2018, 11(11), 2309; https://doi.org/10.3390/ma11112309
Received: 27 October 2018 / Revised: 13 November 2018 / Accepted: 14 November 2018 / Published: 17 November 2018
(This article belongs to the Section Manufacturing Processes and Systems)
Many trays and pieces of Al-Mg and aluminized steel are used in the food industry. Sometimes these elements have non-stick coatings to solve problems related to the adhesion of masses and food products. With use, the coatings deteriorate and lose efficiency and must be removed to apply a new coating. The thermal cycles suffered by these alloys during the removal process of the deteriorated coating (500 °C) and the polymerization of a new coating (400 °C) can affect the durability and efficiency of the metallic substrates. The evolution of the mechanical and microstructural properties of the Al-Mg and aluminized steel substrates after two thermal cycles was studied in this work. The following parameters were analyzed: tensile strength, elongation (%), hardness, ASTM grain size, and the nature and distribution of the constituent particles. The report concluded that the removal of the coating, after each cycle, produced a decrease in the mechanical properties of the substrates. The hardness and tensile strength in Al-Mg decreases between 20–27% and in aluminized steel between 10–11%. In both cases, the process does not compromise the reuse of the substrate for the application of a new coating layer. The final blasting stage does not affect the Al-Mg alloys but may affect the aluminized steel Al-Si protective layer if special precautions are not taken. View Full-Text
Keywords: Al-Mg; aluminized steel; fluoropolymers; coatings; removal Al-Mg; aluminized steel; fluoropolymers; coatings; removal
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MDPI and ACS Style

Rodríguez-Alabanda, Ó.; Romero, P.E.; Guerrero-Vaca, G. Evaluation of Substrates of Al-Mg and Aluminized Steel Coated With Non-Stick Fluoropolymers after the Removal of the Coating. Materials 2018, 11, 2309. https://doi.org/10.3390/ma11112309

AMA Style

Rodríguez-Alabanda Ó, Romero PE, Guerrero-Vaca G. Evaluation of Substrates of Al-Mg and Aluminized Steel Coated With Non-Stick Fluoropolymers after the Removal of the Coating. Materials. 2018; 11(11):2309. https://doi.org/10.3390/ma11112309

Chicago/Turabian Style

Rodríguez-Alabanda, Óscar, Pablo E. Romero, and Guillermo Guerrero-Vaca. 2018. "Evaluation of Substrates of Al-Mg and Aluminized Steel Coated With Non-Stick Fluoropolymers after the Removal of the Coating" Materials 11, no. 11: 2309. https://doi.org/10.3390/ma11112309

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