An Investigation to 304 Stainless Steel Corrosion in Acid Nitric Environment (HNO3) and Sodium Chloride (NaCl)

Electro Chemical Studies For testing effect of NaCl and HNo 3 concentration and also temperature has been conductor on corrosion action of 304 stainless steel. The results show that 304 corrosion of steel become active and passive. During active corrosion, Increasing HNo 3 concentration decreases corrosion intensity and have no high effect upon corrosion. Increasing NaCl concentration to solution cause to reduce OCP (open circuit potential) is expanded through increasing anode reaction and delaying cathode reactions, creating hole, active extinction, more extensive corrosion current. Also increasing NaCl, passive layer with putting 304 steel in HNO has been created and is vanished. Whereas NaCl including aggressive ion Cl - . It worsens passivity and increasing Anode current. The test polarization of temperature resulted in one fixed density, Nitric Acid of increasing temperature for being passive decreases electrode level of 304 steel as well. 304 steel in high temperature till 45ċ according to test. It has no corrosion and used the steel kind of the range from temperament without worry. It is better to use the steel in environment containing Acid Nitric as well. Since 304 steel fall sin corrosion in environment involving sodium chloride.