Corrosion Resistance of Chromium-Nickel Austenitic Stainless Steel 1Cr17Ni7(AISI301)

Corrosion Resistance of 1Cr17Ni7 (AISI301) Austenitic Stainless Steel

Austenitic Stainless Steels (ASS) are the most popular and widely used group of stainless steels with over 70% of the total stainless steel production being austenitic stainless steels. These steels offer many advantages such as good formability, weldability, good corrosion resistance and excellent mechanical properties. One of the most widely used austenitic stainless steels is 1Cr17Ni7 (AISI301) which is a low cost, highly corrosion resistant stainless steel.

This paper presents a review of the corrosion properties of 1Cr17Ni7 (AISI301) austenitic stainless steel. The composition and mechanical properties of 1Cr17Ni7 (AISI301) austenitic stainless steel are discussed. The corrosion resistance of 1Cr17Ni7 (AISI301) in different media, such as deaerated and aerated sea water, chloride solution, and acid-resistant environments are discussed. Corrosion resistance mechanisms of 1Cr17Ni7 (AISI301) are also discussed.

The composition of 1Cr17Ni7 (AISI301) austenitic stainless steel is presented in Table 1. The nominal composition of 1Cr17Ni7 (AISI301) is 17.5-20% chromium, 6.5-8.5% nickel, 0.05-0.15% nitrogen and 0.15-0.30% C (Bal). The mechanical properties of 1Cr17Ni7 (AISI301) are summarized in Table 2.

Table 1. Composition of 1Cr17Ni7 (AISI301) Austenitic Stainless Steel

Element Weight (%)

Chromium (Cr) 17.5-20

Nickel (Ni) 6.5-8.5

Carbon (C) 0.15-0.30

Nitrogen (N) 0.05-0.15

Table 2. Mechanical Properties of 1Cr17Ni7 (AISI301) Austenitic Stainless Steel

Tensile Strength (MPa) 590-760

Yield Strength (MPa) 390-520

Elongation (%) 33-45

Hardness (HRB) 86-93

1Cr17Ni7 (AISI301) has good corrosion resistance in various media such as deaerated sea water, aerated sea water, chloride solution and acid-resistant environments. The corrosion resistance of 1Cr17Ni7 (AISI301) to deaerated sea water and aerated sea water depends on the chromium content of the material. The higher the chromium content, the higher the corrosion resistance. In general, the corrosion resistance of 1Cr17Ni7 (AISI301) to deaerated and aerated sea water increases with increasing chromium content up to 20%.

Corrosion resistance of 1Cr17Ni7 (AISI301) to chloride solutions is much better than to sea water environments. This increased corrosion resistance is attributed to the formation of an adherent chromium-rich passive film which inhibits further corrosion. The corrosion resistance of 1Cr17Ni7 (AISI301) to chloride solutions also increases with increasing chromium content.

The corrosion resistance of 1Cr17Ni7 (AISI301) to acid-resistant environments is good due to the formation of a protective chromium-rich oxide film on the surface. The corrosion resistance of 1Cr17Ni7 (AISI301) to acids depends on the acid concentration and the temperature of the environment.

The corrosion resistance of 1Cr17Ni7 (AISI301) is mainly due to the formation of an adherent and protective passive chromium-rich oxide film on its surface. This film inhibits further corrosion and is primarily responsible for its good corrosion resistance in various environments.

In conclusion, 1Cr17Ni7 (AISI301) is a low-cost and highly corrosion-resistant austenitic stainless steel. It has good corrosion resistance in deaerated and aerated sea water, chloride solutions and acid-resistant environments due to the formation of a protective chromium-rich oxide film on its surface. 1Cr17Ni7 (AISI301) is a cost-effective and corrosion-resistant material that is suitable for many applications.

AISI 301 stainless steel has excellent corrosion resistance. The alloy is used in a variety of environments and applications and offers excellent corrosion resistance to a wide range of acids, alkalis, and chlorides.AISI 301 steel has a high chromium content and a low carbon content. This combination lends the alloy its unique properties such as ductility, strength, and corrosion resistance. The higher the chromium content of the alloy, the greater its corrosion resistance. The lower carbon content also helps to increase the corrosion resistance of the alloy.

AISI 301 stainless steel has good corrosion resistance when exposed to mild corrosion. This alloy is suitable for most corrosive environments, including those requiring more aggressive protection such as concentrated sulfuric acid and hydrochloric acid. When exposed to more aggressive environment such as atmospheric salt spray, the alloy may show signs of pitting and crevice corrosion.

AISI 301 stainless steel can be welded to create pressure vessels, tanks, and pipes. Welding parameters must be carefully controlled in order to maintain the integrity of the weld and reduce the possibility of corrosion. AISI 301 has good through hardening properties, however, the weld areas must be heat treated to achieve the required mechanical properties.

In conclusion, AISI 301 stainless steel has excellent corrosion resistance and can be used in a variety of corrosive environments. Its low carbon content helps to enhance its corrosion resistance and also makes it easier to weld. Welding must be done with proper parameters to maintain weld integrity and protect against corrosion.