Method for cleaning surface of stainless steel

Abstract

A method for cleaning a surface of stainless steel includes: a rinsing step, in which a stainless steel tube having carbon residues is subjected to surface cleaning; a disposition step, in which the tube is disposed into an electrolytic tank containing therein a stainless steel cylinder and positive and negative electrodes of a power source are respectively connected to the tube and the cylinder; an electrolyte preparation step, in which phosphoric acid and sulfuric acid are mixed and then added with glycerin to prepare an electrolyte, which is then added into the tank; an electricity supplying step, in which electrical power is supplied to the tube and the cylinder with the current density flowing through the electrolyte, the temperature, and time period of supplying electricity being properly set; and a cleaning step, in which the electrolyte removes carbon residues from a surface of the tube and polishes the surface.

1 . A method for cleaning a surface of stainless steel, comprising the following steps:
 a rinsing step, in which a stainless steel tube to be polished that has carbon residues is subjected to surface cleaning by applying a cleaning agent and is then rinsed with distilled water and dried;   a disposition step, in which the dried stainless steel tube to be polished is disposed into an electrolytic tank in which a stainless steel cylinder is arranged and a positive electrode of an electrical power source is connected to the stainless steel tube to be polished and a negative electrode of the electrical power source is connected to the stainless steel cylinder;   an electrolyte preparation step, in which phosphoric acid is mixed with sulfuric acid and cooled and then added with glycerin of 18-32 volume % to prepare an electrolyte, which is then added into the electrolytic tank, wherein mixture ratio between the phosphoric acid and the sulfuric acid is 2:1 (V/V);   an electricity supplying step, in which electrical power is supplied to the stainless steel tube to be polished and the stainless steel cylinder with the electrical current density flowing through the electrolyte, the temperature, and time period of supplying electricity being properly set; and   a cleaning step, in which after the stainless steel tube to be polished and the stainless steel cylinder are supplied with electrical power, the electrolyte carries out removal of carbon residues from the surface of the stainless steel tube to be polished and polishing of the surface.   
     
     
         2 . The method according to  claim 1 , wherein the electrical current density flowing through the electrolyte is set to 18-32 mA/cm 2 , the temperature is set to 25-55° C., and the time period of supplying electricity is set to 10-20 minutes. 
     
     
         3 . The method according to  claim 1 , wherein the positive electrode and the negative electrode are spaced by a fixed distance, which is 10-20 mm. 
     
     
         4 . The method according to  claim 1 , wherein said plug member is capable of being plugged into a conventional lamp socket.