Page 9 - chemi
P. 9

Chromium

                                                                        -located in group 6,period 4


                                                                        -melting point 1,907 degree Celsius

                                                                        -boiling point 2,617 degree Celsius


                                                                        -brittle


                                                                        -lustrous

                                                                        -steely-grey
             Used for electroplating







             +WHAT IS ELECTROPLATING



             -the process involves depositing material using an electric current

             -this process results in a thin layer of metal being deposited onto


             the surface of a workpiece called the substrate


             -electroplating is primarily used to change the physical properties

             of an object


             - this process can be used to give objects increased wear


             resistance, corrosion protection or aesthetic appeal, as well as


             increased thickness
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