The application status of color difference formulas in coil coatings was investigated,with a focus on comparing the CIEDE2000 and HunterLab formulas.Experimental studies were conducted to evaluate the two formulas aga...The application status of color difference formulas in coil coatings was investigated,with a focus on comparing the CIEDE2000 and HunterLab formulas.Experimental studies were conducted to evaluate the two formulas against the results of visual inspections.Findings indicate that the CIEDE2000 formula outperforms the HunterLab formula for most color variations.Therefore,the CIEDE2000 formula is suggested as an enhanced method for the quality control of color differences in coil coatings.展开更多
In the present paper, coating systems consisting of a metallic corrosion barrier and a conductive graphitic carbon layer were deposited by a DC vacuum arc process. The coatings were developed in a batch process for ap...In the present paper, coating systems consisting of a metallic corrosion barrier and a conductive graphitic carbon layer were deposited by a DC vacuum arc process. The coatings were developed in a batch process for application in the polymer electrolyte membrane fuel cell (PEMFC), and transferred to a continuous coil process to facilitate industrial mass production. The coating samples in the coil process had to achieve comparable results to the samples produced in the batch process, to meet the requirements of the environment prevailing in the fuel cell.The transfer to roll-to-roll processes is a crucial factor for commercial upscaling of PEMFC production. The experimental results showed that the electrical conductivity and corrosion resistance of the samples in the coil process were significantly improved compared to the uncoated base material and showed comparable performance to batch coated samples. X-ray photoelectron spectroscopy (XPS) was performed to determine the depth profile and the surface composition. Additional measurements were recorded for the contact resistances using the four-wire sensing method as well as corrosion resistance using potentiodynamic methods.展开更多
文摘The application status of color difference formulas in coil coatings was investigated,with a focus on comparing the CIEDE2000 and HunterLab formulas.Experimental studies were conducted to evaluate the two formulas against the results of visual inspections.Findings indicate that the CIEDE2000 formula outperforms the HunterLab formula for most color variations.Therefore,the CIEDE2000 formula is suggested as an enhanced method for the quality control of color differences in coil coatings.
文摘In the present paper, coating systems consisting of a metallic corrosion barrier and a conductive graphitic carbon layer were deposited by a DC vacuum arc process. The coatings were developed in a batch process for application in the polymer electrolyte membrane fuel cell (PEMFC), and transferred to a continuous coil process to facilitate industrial mass production. The coating samples in the coil process had to achieve comparable results to the samples produced in the batch process, to meet the requirements of the environment prevailing in the fuel cell.The transfer to roll-to-roll processes is a crucial factor for commercial upscaling of PEMFC production. The experimental results showed that the electrical conductivity and corrosion resistance of the samples in the coil process were significantly improved compared to the uncoated base material and showed comparable performance to batch coated samples. X-ray photoelectron spectroscopy (XPS) was performed to determine the depth profile and the surface composition. Additional measurements were recorded for the contact resistances using the four-wire sensing method as well as corrosion resistance using potentiodynamic methods.
