Experimental Study of Yellowing Index Comparison between 430 Stainless Steel and 441 Stainless Steel Burner Plates on Domestic Gas Hobs

Abstract

For the household appliances, one the critical design parameter is esthetic. On the surface of thedomestic gas hob burner plates, yellowness problem is seen with the high temperature flame effect. When theburner plate surface is getting higher yellowness, esthetical problem is occurred. In this study, for evaluatingyellowness period and comparing the yellowness ratio, 6 hobs are tested and measured yellowing index by usingcolorimetry method in Haier Europe Quality Reliability Laboratory. 3 of the 6 hobs have the 430SS burnerplate, other 3 hobs have the 441SS burner plate. During 360 cycles of hob working, 4 times yellowness ismeasured in the beginning (cycle 0), then end of the 120,240 and 360. cycles. Each measurement is repeated 2times on one area to increase accuracy of measurement. In the end of the study, results show that 441SS materialhas lower yellow color changing than 430SS material as a burner plate in the same conditions.