THE EFFECT OF SHOT PEENING ON THE STRESS CORROSION CRACKING RESISTANCE OF 304 STAINLESS STEEL IMMERSED IN NACL SOLUTION

Corrosion can deteriorate the material as a result of reaction with its environment. It is one of the major problems encountered in industry and it does cost the world billions of dollars every year. Substantial savings can be obtained in many types of plants through the use of corrosion-resistant materials of construction. Pitting, corrosion and stress corrosion cracking can lead to catastrophic unexpected failures to many engineering applications. Resistance to stress corrosion cracking and pitting can be greatly increased by a cold working process called shot peening. The present experimental work aimed to evaluate the effect of shot peening on retarding pitting, and enhancing the stress corrosion cracking resistance of 304 stainless steel, in a sodium chloride solution (NaCl) at 60˚ C. The results obtained indicated that shot peening is beneficial against corrosion fatigue. Also it is found from the results that increasing intensity and coverage of shot peening will lead to an increase in corrosion resistance