Electrochemical coloration of stainless steel as an alternative for architectural coatings

Electrochemical coloration of stainless steel as an alternative for architectural coatings

Junqueira, Rosa Maria Rabelo; Loureiro, Célia Regina de Oliveira

Artigo Completo:

The characterization of architectural coatings grown on the surface of AISI 304 stainless steel by an electrochemical coloration process was realized by multiple techniques. The interference colored coatings were grown in a sulphochromic solution at room temperature by an alternating pulse current method. The morphology and chemical state of the elements in the films were investigated by field emission scanning electron microscopy (FESEM), atomic force microscopy (AFM), glow discharge optical emission spectrometry (GDOES), and infrared Fourier transform spectroscopy (FTIR). Depth-sensing indentation (DSI) experiments and wear abrasion tests were employed to assess the mechanical resistance of the films. The coloration process resulted in porous thin films which increased the surface roughness of the substrate. The interference films mainly consisted of hydrated chromium oxide containing iron. Increasing film thickness produced different colors and affected the mechanical properties of the coating-substrate.

The characterization of architectural coatings grown on the surface of AISI 304 stainless steel by an electrochemical coloration process was realized by multiple techniques. The interference colored coatings were grown in a sulphochromic solution at room temperature by an alternating pulse current method. The morphology and chemical state of the elements in the films were investigated by field emission scanning electron microscopy (FESEM), atomic force microscopy (AFM), glow discharge optical emission spectrometry (GDOES), and infrared Fourier transform spectroscopy (FTIR). Depth-sensing indentation (DSI) experiments and wear abrasion tests were employed to assess the mechanical resistance of the films. The coloration process resulted in porous thin films which increased the surface roughness of the substrate. The interference films mainly consisted of hydrated chromium oxide containing iron. Increasing film thickness produced different colors and affected the mechanical properties of the coating-substrate.

Palavras-chave:

DOI: 10.5151/chempro-s3ie-05

Como citar:

Junqueira, Rosa Maria Rabelo; Loureiro, Célia Regina de Oliveira; "Electrochemical coloration of stainless steel as an alternative for architectural coatings", p-37-48. In: In Proceedings of the 1st International Seminar on Industrial Innovation in Electrochemistry [=Blucher Chemistry Proceedings]. São Paulo: Blucher, 2014. São Paulo: Blucher, 2014.
ISSN 23184043, DOI 10.5151/chempro-s3ie-05