Development of Cr Coated AISI 304 Material for Artificial Hip Joint

Abstract

The aim of this study is to determine the mechanical strength of the Cr coated Stainless Steel (AISI) 304 material which will be applied to the artificial hip joint. The coating method used by electroplating thin dense chrome. The variables were used in this research are coating time, Cr acid concentration, and voltage. The Tests carried out were hardness test and compressive strength. The highest hardness test was reached at variations in coating time of 15 min, concentration of Cr acid 200 mol, and voltage 6 V (287 HVN). This value is higher than the hardness of human bone (50 HVN). The highest compressive strength was obtained in coating time of 15 min, the concentration of Cr acid 200 mol, and the voltage of 6 V (248 MPa). This value is also higher than the compressive strength of human bones (230 MPa). These shows that the Cr coated AISI 304 material has a good mechanical strength to be applied as an artificial hip joint material because it has a higher hardness and compressive strength than the human bone.