scholarly journals Corrosion Resistance and Pitting Behaviour of Low-Carbon High-Mn Steels in Chloride Solution

2016 ◽  
Vol 61 (2) ◽  
pp. 825-832
Author(s):  
A. Grajcar ◽  
B. Grzegorczyk ◽  
A. Kozłowska
Keyword(s):  
Corrosion Resistance ◽  
Corrosion Behaviour ◽  
Cold Deformation ◽  
Metallic Matrix ◽  
Corrosion Damage ◽  
Austenitic Steels ◽  
Low Carbon ◽  
Deformation Bands ◽  
Cold Worked ◽  
Corrosion Pits

Abstract Corrosion resistance of the X4MnSiAlNbTi27-4-2 and X6MnSiAlNbTi26-3-3 type austenitic steels, after hot deformation as well as after cold rolling, were evaluated in 3.5% NaCl solution using potentiodynamic polarization tests. A type of nonmetallic inclusions and their pitting corrosion behaviour were investigated. Additionally, the effect of cold deformation on the corrosion resistance of high-Mn steels was studied. The SEM micrographs revealed that corrosion damage formed in both investigated steels is characterized by various shapes and an irregular distribution at the metallic matrix, independently on the steel state (thermomechanically treated or cold worked). Corrosion pits are generated both in grain interiors, grain boundaries and along the deformation bands. Moreover, corrosion damage is stronger in cold deformed steels in comparison to the thermomechanically treated specimens. EDS analysis revealed that corrosion pits preferentially nucleated on MnS and AlN inclusions or complex oxysulphides. The morphology of corrosion damage in 3.5% NaCl supports the data registered in potentiodynamic tests.

SAE 1020

Alloy Digest ◽  
1987 ◽  
Vol 36 (2) ◽  
Keyword(s):  
Fracture Toughness ◽  
Corrosion Resistance ◽  
Carbon Steel ◽  
Low Carbon Steel ◽  
Heat Treating ◽  
Low Carbon ◽  
Steel Mills ◽  
Temperature Performance ◽  
Wide Range ◽  
Cold Worked

Abstract SAE 1020 is a low-carbon steel combining good machinability, workability and weldability. It is carburized for use in case-hardened components and it is used for a wide range of applications in the hot-worked, cold-worked, normalized or quenched-and-tempered conditions. Its many uses include bolts, rods, plate applications, machinery components, case-hardened parts, spinning tools and trimming dies. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness. It also includes information on low temperature performance and corrosion resistance as well as heat treating, machining, joining, and surface treatment. Filing Code: CS-113. Producer or source: Carbon steel mills.

scholarly journals Investigation on Corrosion Behaviour of Polymeric Coatings on Weathering Steel Under 3.5% NaCl Solution

2021 ◽  
Author(s):  
Venkatesh R ◽  
S Manivannan ◽  
Kumaresh Babu S P
Keyword(s):  
Corrosion Resistance ◽  
Corrosion Behaviour ◽  
Salt Spray ◽  
Dynamic Test ◽  
Protective Layer ◽  
Immersion Test ◽  
Weathering Steel ◽  
Main Concern ◽  
Low Carbon ◽  
Corrosion Tests

Abstract Weathering steel, a low carbon alloy steel, most widely used in marine transportation and construction fields like bridges, sculptures where corrosion resistance is the main concern. Weathering steel creates an adhering protective coating on its surface in the right environmental conditions. The protective layer which is formed on the surface weathering steel known as patina. It protects the structure from further corrosion to occur. When these weathering steels are continuously exposed to moisture environment its corrosion resistance decreases. So, our investigation deals about the studies of the coatings used on weathering steel to increase its corrosion resistance in marine conditions. The coatings applied on the substrate were poly urea, polyurethane, epoxy and black enamel. Corrosion tests were performed on these coated samples to evaluate their corrosion behaviour in different environments. Corrosion tests that were performed are immersion test, salt spray test and potentio-dynamic test. The profilometry test is investigated and it confirmed the depth of the corrosion on the coatings. Based on the corrosion studies, we conclude that poly urea is the excellent coating followed by polyurethane, black enamel and epoxy.

CRUCIBLE XM 19 STAINLESS

Alloy Digest ◽  
1982 ◽  
Vol 31 (9) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Stainless Steels ◽  
Cold Work ◽  
High Strength ◽  
Heat Treating ◽  
Low Carbon ◽  
Good Corrosion Resistance ◽  
Temperature Performance ◽  
Aisi Type ◽  
Cold Worked

Abstract CRUCIBLE XM 19 Stainless is a nitrogen-strengthened, low-carbon austenitic stainless steel that provides good corrosion resistance in combination with high strength. The alloy has better corrosion resistance than AISI Type 316 with approximately twice the yield strength. It can be welded, machined and cold worked using the same equipment and methods used for the conventional AISI 300 series stainless steels. It is nonmagnetic as annealed and after severe cold work. Its many uses include cables, fasteners, pumps, valves, marine hardware and springs. This datasheet provides information on composition, physical properties, hardness, and tensile properties as well as fracture toughness. It also includes information on low temperature performance and corrosion resistance as well as forming, heat treating, machining, joining, and surface treatment. Filing Code: SS-414. Producer or source: Crucible Specialty Metals Division, Colt Industries.

Corrosion Resistance Evaluation and Effects of Prior Corrosion and Stress on Fatigue Behavior of Friction Stir Welded AA2024-T3

CORROSION ◽  
10.5006/2447 ◽  
2017 ◽  
Vol 74 (2) ◽  
pp. 169-180 ◽  
Author(s):  
Takao Okada ◽  
Shigeru Machida ◽  
Toshiya Nakamura
Keyword(s):  
Corrosion Resistance ◽  
Fatigue Life ◽  
Fatigue Behavior ◽  
Base Material ◽  
Corrosion Damage ◽  
Al Alloy ◽  
Line Energy ◽  
Friction Stir ◽  
Aspect Ratios ◽  
Corrosion Pits

The corrosion resistance of 2024-T3 (UNS A92024) Al alloy with no clad layer and that of friction stir welded (FSW) joint specimens fabricated from the same material were evaluated. The surfaces of both the alloy base material and FSW joint specimens were ground out before being exposed to a 3.0% sodium chloride solution at 60°C for 24, 48, 72, or 96 h. The corrosion pits on the base material samples were found to be randomly distributed, while those on the FSW joint were formed around the edge and center of the weld line. Energy dispersive x-ray spectrometry indicated constituent particles containing Mg at the grain boundaries in the thermomechanically affected zone and stir zone of the FSW joint; this Mg content aggravated the corrosion damage in those regions. The depth and volume of the corrosion pits in the FSW joint were greater than those in the base material. However, the aspect ratios of the corrosion pits in the base material and FSW were similar. Prior-corroded specimens were fatigue tested to evaluate the effect of corrosion damage. The fatigue life of the base material with corrosion damage was slightly shorter than that of the FSW joint specimens with corrosion damage, and the fatigue life of an uncorroded FSW joint specimen was more than 10 times longer than that of a corroded specimen. Thus, corrosion damage has a severely detrimental effect on fatigue life. Further, fracture surface observation revealed that the fracture origins in the FSW joint specimens tended to be multiple corrosion pits; however, the corrosion pits with the greatest depth or volume did not necessarily become fracture origins in the base material or FSW joints.

scholarly journals Improvement in the microhardness and corrosion behaviour of Ti-14Mn biomedical alloy by cold working

2022 ◽  
Author(s):  
Mohammed Gouda ◽  
Salah Salman ◽  
Saad Ebied
Keyword(s):  
Corrosion Resistance ◽  
Cold Rolling ◽  
Corrosion Behaviour ◽  
Cold Deformation ◽  
Solution Treatment ◽  
Inert Atmosphere ◽  
Linear Increase ◽  
Β Phase ◽  
Before And After ◽  
Mechanical Properties And Corrosion

Abstract β-titanium alloys are essential in many applications, particularly biomedical applications. Ti-14Mn β-type alloy was produced using an electric arc furnace from raw alloying elements in an inert atmosphere. The alloy was homogenized at 1000 °C for 8 hr to ensure the complete composition distribution, followed by solution treatment at 900 °C, then quenched in ice water. The alloy was subjected to cold deformation via cold rolling with different ratios: 10, 30, and 90%. The phases change, microstructure, mechanical properties, and corrosion resistance of Ti-14Mn alloys were evaluated before and after cold rolling. The results showed that the β-phase is the only existed phase even after a high degree of deformation. The microstructure shows a combination of twinning and slipping deformation mechanisms in the deformed alloy. Microhardness values indicated a linear increase equal to 30% by increasing the ratio of cold deformation due to the strain hardening effect. The corrosion resistance of Ti-14Mn alloy was doubled after 90% cold rolling.

CRUCIBLE 316L

Alloy Digest ◽  
1981 ◽  
Vol 30 (9) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Heat Treating ◽  
Nickel Steel ◽  
Low Carbon ◽  
Annealed Condition ◽  
Good Corrosion Resistance ◽  
Screw Machine ◽  
Machined Parts ◽  
Cold Worked ◽  
Specialty Metals

Abstract CRUCIBLE 316L is a non-hardenable, low-carbon austenitic chromium-nickel steel with superior corrosion and heat-resisting qualities. CRUCIBLE 316L is designed for special applications requiring resistance to sensitization and intergranular corrosion. This grade is non-magnetic in the annealed condition but slightly magnetic when cold worked. Typical applications are screw machine products and all machined parts requiring good corrosion resistance or non-magnetic properties. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: SS-392. Producer or source: Crucible Specialty Metals Division, Colt Industries.

Corrosion Behavior of TWIP Steels in 3.5% NaCl Solution

2012 ◽  
Vol 457-458 ◽  
pp. 334-337 ◽  
Author(s):  
Gholam Reza Razavi ◽  
Hossein Monajati
Keyword(s):  
Corrosion Resistance ◽  
High Strength ◽  
Austenitic Steels ◽  
Nacl Solution ◽  
Oil Platforms ◽  
High Dissolution Rate ◽  
Twip Steels ◽  
Corrosion Pits ◽  
Hot Rolled ◽  
Strength And Ductility

TWIP steels are high Mn (17-35%) austenitic steels having strength and ductility concurrently. This makes them suitable for applications that need high strength and ductility like gas tanks and oil platforms. To these applications corrosion resistance of these steel is also of paramount importance and needs to be noticed. This was achieved by two usual methods of weight loss and potentiodynamic polarization of the samples, after that they casted and hot rolled in experimental scale. The observed corrosion pits are related to the chemical composition. It is connected with the high dissolution rate of Mn and Fe atoms in NaCl solution. Fractographic analyses of samples revealed corrosion products on their surface in a form of pits with diversified size.

Influence of Molybdenum and Copper on the Corrosion Resistance of High Strength Austenitic Steels

2010 ◽  
Vol 638-642 ◽  
pp. 2979-2985 ◽  
Author(s):  
Hans Berns ◽  
Sascha Riedner ◽  
Birger Hussong
Keyword(s):  
Corrosion Resistance ◽  
Cross Sections ◽  
Atmospheric Pressure ◽  
Corrosion Behaviour ◽  
Cold Work ◽  
High Strength ◽  
Austenitic Steels ◽  
Solution Annealing ◽  
Quenching Rate ◽  
True Fracture

Joint alloying of 0.85 to 1.1 mass% C + N raises the strength and cold work hardening of steels with 18 to 19 mass% Cr and Mn each and allows to produce them at atmospheric pressure. A yield strength of 600 MPa is combined with a true fracture stress of almost 2500 MPa and ≈ 70 % elongation. However, there is a risk of carbide/nitride precipitation during quenching of thicker cross sections after solution annealing. The addition of Mo and Cu affects the corrosion resistance as well as the precipitation. Submersion test and current density/potential tests in several aqueous solutions characterize the corrosion behaviour. Tests on intercrystalline corrosion are used to detect the precipitation as a function of quenching rate. It is shown that the C/N ratio is of key importance in improving the properties.

AISI 1020

Alloy Digest ◽  
1971 ◽  
Vol 20 (2) ◽  
Keyword(s):  
Fracture Toughness ◽  
Corrosion Resistance ◽  
Carbon Steel ◽  
Physical Properties ◽  
Low Carbon Steel ◽  
Heat Treating ◽  
Low Carbon ◽  
Steel Mills ◽  
Wide Range ◽  
Cold Worked

Abstract AISI 1020 is a low carbon steel combining good machinability, workability, and weldability. It is used for case-hardened components and for a wide range of applications in the hot-worked, cold-worked, normalized or quenched-and-tempered conditions. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: CS-39. Producer or source: Carbon and alloy steel mills.

CRUCIBLE 304L

Alloy Digest ◽  
1983 ◽  
Vol 32 (2) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Heat Treating ◽  
Nickel Steel ◽  
Low Carbon ◽  
Annealed Condition ◽  
Good Corrosion Resistance ◽  
Screw Machine ◽  
Machined Parts ◽  
Cold Worked ◽  
Specialty Metals

Abstract CRUCIBLE 3041 is a non-hardenable, low-carbon austenitic chromium-nickel steel designed for special applications. It is particularly suitable for applications requiring welding operations where it is not practical to anneal alter welding. This grade is non-magnetic in the annealed condition but slightly magnetic when cold worked. Typical applications are screw machine products and all machined parts requiring good corrosion resistance or non-magnetic properties. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness. It also includes information on corrosion resistance as well as heat treating, machining, and joining. Filing Code: SS-421. Producer or source: Crucible Specialty Metals Division, Colt Industries.

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