Origin of Interference Colors on Austenitic Stainless Steel

Abstract

Data are presented on the coloring conditions, colored layer parameters, and color characteristics of stainless steel 304 samples treated in an electrolytic cell (60 Hz, 100 mV) using a mixture of 5 M sulfuric acid and 2.5 M chromic acid. Reflectance spectra indicate that the samples have high-purity color mainly in the yellow region and that the color is due to interference oscillations in the visible range. In addition, reflectance data in conjunction with composition-depth profiles obtained using glow discharge spectrometry indicate that the coloration of the samples is due not only to reflectance oscillations but also to the subtraction effect. The reduced Fe content and significant oxygen content in the near-surface region attest to the formation of a mixed oxide layer. Atomic-force microscopy examination indicates that the sample surface has an island structure.

Effect of hardening and sealing on color of chemically colored stainless steel

“…To summarize, the reflectance curves of samples with different potential differences at different wavelengths are similar to sine curves, which is consistent with the results of Musa et al 13 and Vazquez-Santoyo et al 15 . The fluctuation of each curve is the result of light interference.…”

“…Musa et al 13 have measured the reflectivity of chemically colored stainless steel samples, their optical properties have been obtained, the results show that heating and covering by Si 3 N 4 film could improve the absorption of sunlight. Vazquez-Santoyo et al 15 have measured wavelength-reflectance curves of colored stainless steel samples, and the colors of stainless steel samples have been expressed in Commission Internationale de l´Eclairage (International Commission on illumination, CIE) coordinate system by using chromatometry calculation. It can be seen that colors of stainless steel samples can be effectively expressed by reflectivity curves and CIE coordinate system.…”

Characterization and Improvement of Signal Drift Associated with Electron Ionization Quadrupole Mass Spectrometry

“…Under these conditions, the initial layer will grow, creating the typical interference colors of the surface. From this color pattern, a minimum thickness of about 100 nm is assumed . However, the proximity of the filament which reaches a temperature of around 1500 °C can lead to hot spots on the repeller.…”

Study of the anticorrosive behavior of samarium as a corrosion inhibitor in multilayer systems for aluminum alloy

“…8a). The colors are caused by an interference effect associated with the thickness and the refractive index of the coating 66 . Figure 8c shows a continuous layer using 60 s of SiO 2 deposition using APPJ, exhibiting particles throughout the surface.…”