Express analysis of the corrosion resistance of alloys of the Ni-Cr-Mo system (Ni-Cr, Ni-Mo) according to the set amount of tone in the reflected-light spectral group

This article proposes a method for evaluating the corrosion resistance of single-phase nickel alloys of the Ni-Cr-Mo, Ni-Cr, Ni-Mo systems having a solid solution structure. The initial data for evaluating the corrosion resistance are the data obtained as a result of the analysis of the tone components of the reflected visible light by calculating the wavelength of the reflected light. The proposed method evaluates the amount of tone in the participating color groups, where tone is a hue or mixture of pure colors to which pure gray is added (equal amounts of black and white). The received information is processed using the developed software that performs the analysis of tone components. The method consists in receiving and fixing reflected visible light from a fragment of material. Next, it is evaluated by wavelength, making a histogram of the normalized amount of tone in the participating color groups that are in a certain wavelength range of reflected light. Further, the calculated amount of tone in the color group is related to the set number of pixels of the image of the fragment, determining, respectively, the specific amount of tone in the color group. In the case of several color groups in reflected light, the predominant color group is determined, where the normalized amount of tone is calculated. Next, the normalized amount of tone in the group is related to the total number of pixels in the fragment. A larger tone value determined for the fragment pixels characterizes the best corrosion resistance of the compared alloy samples. Images of fragments for evaluation are offered in digital format.

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