Final answer:
Increased resistance to stress corrosion cracking can be achieved by creating stainless steel through the alloying of iron with metals like chromium, which forms a protective oxide layer, as well as by using cathodic protection and galvanization.
Step-by-step explanation:
One way of obtaining increased resistance to stress corrosion cracking is by alloying iron with other metals such as chromium to create stainless steel. This strategy is effective because the added chromium accumulates near the surface and forms a passivating oxide layer that provides protection against corrosion.
Additionally, methods like cathodic protection and galvanization are used to prevent corrosion. Zinc or magnesium can be attached to iron as sacrificial anodes, corroding in place of the iron. Alternatively, protective coatings such as paint or grease, and metal alloys that include nonmetals also contribute to the resistance against stress corrosion cracking.