Corrosion mechanism of a new-type low-alloy corrosion resistant steel containing Sb used in acid environment

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Ying Yang ◽  
Wei Wu ◽  
Xuequn Cheng ◽  
Jinbin Zhao ◽  
Baijie Zhaoal ◽  
...  
Keyword(s):  
Alloy Steel ◽  
Corrosion Mechanism ◽  
Corrosion Resistant Steel ◽  
Resistant Steel ◽  
Low Alloy Steel ◽  
Corrosion Resistant ◽  
Content Type ◽  
X Ray ◽  
Acid Environment ◽  
New Type

Purpose This study aims to develops a new-type low-alloy corrosion resistant steel containing Sb and investigate the corrosion mechanism of this new-type low-alloy steel. Design/methodology/approach Energy dispersive spectrometer, X-ray photoelectron spectroscopy, X-Ray diffraction and scanning electron microscopy were used to evaluate the corrosion resistance of the rust layers formed on these samples. Laser confocal microscopy was used to observe the corroded surfaces of the steels. Findings Results showed that Sb added can consume H+ in the solution, thereby preventing the oxygen reaction to slow down the corrosion rate. Meanwhile, a stable and insoluble substance (Sb2O3) in the acidic solution would be produced when the reaction of the product of Sb and H+ with the enough dissolved oxygen in the solution. Due to the precipitation of Sb2O3 and iron oxyhydroxides, the rust layer of Sb-containing steel became more uniform and compact, which resulted in better corrosion resistance in acid environment. Originality/value In this study, a new-type acid resistant low-alloy steel containing Sb was developed. Compared with the results, the corrosion mechanism of the new-type low-alloy steel in acid environment was discussed.

The influence of Ni on the microstructure and corrosion resistance of high-strength low alloy steel in the Cl-containing environment

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Dan Wang ◽  
Qingdong Zhong ◽  
Jian Yang ◽  
Shujian Zhang
Keyword(s):  
Corrosion Resistance ◽  
Alloy Steel ◽  
Photoelectron Spectroscopy ◽  
Hsla Steel ◽  
Electrochemical Techniques ◽  
High Strength ◽  
Low Alloy Steel ◽  
Transfer Resistance ◽  
Content Type ◽  
X Ray

Purpose This paper aims to search the optimum content of Ni on the microstructure, phase and electrochemical behavior of high-strength low alloy (HSLA) steel in the 3.5 wt.% NaCl solution. Design/methodology/approach The microstructure and corrosion resistance of Ni-containing HSLA steel in the simulated marine environment was studied by optical microscopy, scanning electron microscopy, X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and electrochemical techniques. Findings The sample containing 3.55 wt.% of nickel exhibited a finer grain size of 10 μm and a lower icorr of 2.169 µA cm−2. The XRD patterns showed that the Fe-Cr-Ni solid solution, FeC and Cr3C2 were observed in samples when Ni was added. Besides, the 3.55 wt.% of nickel addition enhanced the charge transfer resistance of the low alloy steel which suggested the sample possessed excellent inhibition of electrochemical reaction and corrosion resistance. The XPS spectrum suggested that nickel was beneficial to improve the corrosion resistance of steel by forming protective oxides, and the ratio of Fe2+/Fe3+ in protective oxides was increased. Practical implications Finding the comprehensive performance of HSLA steel which can be applied to unmanned surface vehicles in marine operations. Originality/value This study has a guiding significance for optimizing the composition of HSLA steel in a Cl- containing environment.

scholarly journals Corrosion mechanism of corrosion-resistant steel developed for bottom plate of cargo oil tanks

2013 ◽  
Vol 26 (3) ◽  
pp. 257-264 ◽  
Author(s):  
Feilong Sun ◽  
Xiaogang Li ◽  
Fan Zhang ◽  
Xuequn Cheng ◽  
Cheng Zhou ◽  
...  
Keyword(s):  
Bottom Plate ◽  
Corrosion Mechanism ◽  
Corrosion Resistant Steel ◽  
Resistant Steel ◽  
Corrosion Resistant ◽  
Oil Tanks

Development of Corrosion Resistant Steel for Bottom Plates of Crude Oil Tankers and Onboard Evaluation Results

2012 ◽  
Author(s):  
Minoru Ito ◽  
Michio Kaneko ◽  
Seiji Nishimura ◽  
Hidehiko Sato
Keyword(s):  
Corrosion Resistance ◽  
Pitting Corrosion ◽  
Test Method ◽  
Corrosion Mechanism ◽  
Corrosion Resistant Steel ◽  
Resistant Steel ◽  
Corrosion Resistant ◽  
Cargo Oil Tank ◽  
Oil Tanks ◽  
Oil Tankers

Pitting corrosion on the bottom plates of cargo oil tanks (COT) in very large crude carriers (VLCC) is very serious problem. Each tank may suffer up to 1,000 pits, with some reaching a depth of as much as 10 mm. As a result, the workload of repairing such pitting corrosions in periodical dock inspection is extremely heavy. Many studies have already been conducted to clarify the mechanism of pitting corrosion, but it has yet to be fully understood. We have clarified the pitting corrosion mechanism through onboard research on some VLCCs and various corrosion tests, in addition to the findings obtained by previous studies. Based on our understanding of the mechanism, we developed a corrosion test method to simulate the corrosive environment within the pits. Furthermore, we developed a new corrosion resistant steel (CRS) with trace amounts of alloying elements. The corrosion rate for CRS is less than one-fifth of conventional steels. Due to its very low alloy content, the weldability and mechanical properties of CRS remain similar to conventional steels. This CRS has already been applied to several VLCCs and we have examined its corrosion resistance through onboard investigations of the two VLCCs. One was for all its uncoated COT bottom plates, which were built of CRS, at the first docking (after 2.5 years). No pits deeper than 4 mm were found in the bottom plates of any COTs. Also, only about twenty pits of 2∼4-mm depth were found. The other was for the bottom plates of six unpainted COTs built of CRS at her first and second dockings (after 2.3 and 5 years). At five years, tens of pits deeper than 4 mm were found in all, but the pit count was much lower than that of VLCCs constructed of conventional steel. Thus, the good corrosion resistance of CRS was confirmed. In addition, it was also revealed through onboard research during a dock inspection that pit growth halted on VLCCs with more than five years service. SOLAS II-1 Cargo Oil Tank Corrosion Protection, which adopts the test method developed by us as the qualification test for bottom plates, comes into effect in 2013. In addition, CRS has already been certified by Class NK as corrosion resistant steel for COT bottom plates. CRS is set to play its part in the safe navigation of oil tankers. Furthermore, CRS does not require a protective coating of paint, which also benefits the global environment by reducing the use of volatile organic compounds.

REMANIT 4439

Alloy Digest ◽  
1993 ◽  
Vol 42 (11) ◽  
Keyword(s):  
Mechanical Properties ◽  
Corrosion Resistance ◽  
Stainless Steels ◽  
Crevice Corrosion ◽  
Heat Treating ◽  
Corrosion Resistant Steel ◽  
Resistant Steel ◽  
Low Carbon ◽  
Corrosion Resistant ◽  
Mechanical Properties And Corrosion

Abstract REMANIT 4439 is a highly corrosion resistant steel with low carbon content, an addition of nitrogen to enhance both mechanical properties and corrosion resistance, and higher molybdenum than most stainless steels to resist pitting and crevice corrosion in chloride media. This datasheet provides information on composition, physical properties, and elasticity. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: SS-556. Producer or source: Thyssen Stahl AG.

ARMCO 410 Cb

Alloy Digest ◽  
1963 ◽  
Vol 12 (7) ◽  
Keyword(s):  
Fracture Toughness ◽  
Corrosion Resistance ◽  
High Temperature ◽  
Physical Properties ◽  
Tensile Properties ◽  
Heat Treating ◽  
Corrosion Resistant Steel ◽  
Resistant Steel ◽  
Corrosion Resistant ◽  
Temperature Performance

Abstract Armco 410 Cb is a modified Type 410 corrosion resistant steel by the addition of columbium. It is extremely tough and impact resistant. It is a hardenable grade but less sensitive to tempering variables than Type 410. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness, creep, and fatigue. It also includes information on low and high temperature performance, and corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: SS-145. Producer or source: Armco Inc., Eastern Steel Division. See also Alloy Digest SS-261, October 1971.

RA 309

Alloy Digest ◽  
1963 ◽  
Vol 12 (4) ◽  
Keyword(s):  
Corrosion Resistance ◽  
High Temperature ◽  
Physical Properties ◽  
Tensile Properties ◽  
High Temperatures ◽  
Heat Treating ◽  
Corrosion Resistant Steel ◽  
Resistant Steel ◽  
Corrosion Resistant ◽  
Temperature Performance

Abstract RA 309 is a chromium-nickel heat and corrosion resistant steel recommended for high temperatures applications. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as creep. It also includes information on high temperature performance and corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: SS-142. Producer or source: Rolled Alloys Inc..

USS CARILLOY 2% Cr-1/2% Mo

Alloy Digest ◽  
1957 ◽  
Vol 6 (1) ◽  
Keyword(s):  
Fracture Toughness ◽  
Corrosion Resistance ◽  
Heat Treating ◽  
Corrosion Resistant Steel ◽  
Resistant Steel ◽  
Corrosion Resistant ◽  
United States Steel Corporation ◽  
Temperature Performance ◽  
Alloy Oxidation ◽  
Oxidation And Corrosion

Abstract CARILLOY 2% Cr-1/2% Mo is a low alloy oxidation and corrosion resistant steel suitable for moderately high (900-1100 deg. F.) temperature use. This datasheet provides information on composition, physical properties, elasticity, and tensile properties as well as fracture toughness and creep. It also includes information on high temperature performance and corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: SA-54. Producer or source: United States Steel Corporation.

FERRIUM S53

Alloy Digest ◽  
2008 ◽  
Vol 57 (12) ◽  
Keyword(s):  
Mechanical Properties ◽  
Fracture Toughness ◽  
Corrosion Resistance ◽  
Heat Treating ◽  
Corrosion Resistant Steel ◽  
Resistant Steel ◽  
Corrosion Resistant ◽  
Aircraft Landing ◽  
Aircraft Landing Gear ◽  
Better Than

Abstract Ferrium S53 was developed for use as a structural corrosion resistant steel for aircraft landing gear. S53 has a corrosion resistance equivalent to 440C, strength equivalent to or better than 300M (AMS 6257A) and SAE 4340 (see Mechanical Properties), optimum microstructure features for maximum fatigue resistance, and a surface hardenability equal to or greater than 67 HRC for wear and fatigue. This datasheet is an update to Alloy Digest SS-942 and SS-1003. This datasheet provides information on composition, physical properties, hardness, and tensile properties as well as fracture toughness. It also includes information on corrosion resistance as well as heat treating and machining. Filing Code: SA-589. Producer or source: QuesTek Innovations, LLC.

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