State Key Laboratory For Advanced Metals And Materialsuniversity Of Science And Technology Beijingbeijing100083ina

Laboratory for, China

State Key Laboratory For Advanced Metals And Materialsuniversity Of Science And Technology Beijingbeijing100083ina

Laboratory for, China

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Zhang M.X.,State Key Laboratory For Advanced Metals And Materialsuniversity Of Science And Technology Beijingbeijing100083ina | Yang B.,State Key Laboratory For Advanced Metals And Materialsuniversity Of Science And Technology Beijingbeijing100083ina | Wang S.L.,State Key Laboratory For Advanced Metals And Materialsuniversity Of Science And Technology Beijingbeijing100083ina | Wu H.C.,State Key Laboratory For Advanced Metals And Materialsuniversity Of Science And Technology Beijingbeijing100083ina | Shi Y.Z.,State Key Laboratory For Advanced Metals And Materialsuniversity Of Science And Technology Beijingbeijing100083ina
Materials and Corrosion | Year: 2015

By using the Taguchi method with an L16 (45) orthogonal array, the conditions of the double loop electrochemical potentiokinetic reactivation (DL-EPR) technique have been optimized to evaluate the different degrees of the precipitates among the sensitized AISI 316LN austenitic stainless steels. The optimum conditions under the highest resolution of DL-EPR were approved to be 1.2M sulfuric acid, 0.05M potassium thiocyanate, 0.8M sodium chloride, 40mV/min scan rate, and 40°C. Analysis of variance (ANOVA) was used to determine the effect of the control parameters on the degree of sensitization (DOS) difference. As a result of ANOVA, the sulfuric acid concentration had the most significant effect on the DOS difference among the five factors. The percent contributions of sulfuric acid (H2SO4), potassium thiocyanate (KSCN), sodium chloride (NaCl), scan rate, and temperature to the DOS difference were 53.22, 5.33, 21.74, 4.92, and 14.79%, respectively. Finally, the maximum DOS difference (6.7908) obtained from the confirmation experiment showed an approximate 11 times improvement. © 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

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