Pelapisan Chrome terhadap Zirconium dengan Metoda Pack Cementation terhadap Laju Korosi

Abstract

The manufacture of zirconium alloy coating with chrome by using pack cementation method and comparison of its corrosion Knowing the effect of coating on zirconium plate in 9000C temperature and comparing its corrosion characteristics in NaOH solution in 8000C temperature where the effect of soaking time on corrosion rate for mass value per each hour. This research aims to make the coating on zirconium plate resistant to corrosion. Looking at the time variation on the decrease in sample mass with corrosion test results. Preparation of coating with a mixture of powder Cr 15 gr, Al2O3 30 gr, NH4Cl 5 gr in a mixture until homogeneous sintering for 10 hours. Zirconium plates in corrosion tests with pure NaOH experienced a weight loss of 162,0681 mpy and without coating corrosion test corrosion rate value of 6,8756 mpy. To analyze the elemental composition of a material (XRF), surface morphology structure (SEM), crystal structure (XRD), zirconium plate hardness analysis (Vickers Hardness). The result values of the physical properties of zirconium plates coated and without Cr coating are very different, the SEM test showed the morphology of the formation of the coating experienced uneven distribution on the zirconium plate, the XRD test showed a crystal peak where zirconium before coating had a hexagonal crystal peak and when coated and corroded it changed to monoclinic, average crystal size on pure zirconium plate 28.04nm, zirconium corrosion 4, 87 nm and for coated coating 16.96 nm vickers hardness test results Zirconium NaOH 375.99 HV, Zirconium Chrome 169.07HV, Zirconium Chrome corrosion NaOH 147.91 HV