Corrosion resistance and mechanical characteristics of dual-phase steel B500c, after shot blasting processes

2017 ◽  
Vol 8 (5) ◽  
pp. 544-564
Author(s):  
Argyro Drakakaki ◽  
Charis Apostolopoulos ◽  
Alexandros Katsaounis ◽  
Hasa Bjorn
Keyword(s):  
Corrosion Resistance ◽  
Chemical Composition ◽  
Dual Phase Steel ◽  
Structural Integrity ◽  
Positive Impact ◽  
Electrochemical Techniques ◽  
Dual Phase ◽  
Shot Blasting ◽  
Production Mode ◽  
Content Type

Purpose Corrosive agent constitutes a major problem for constructions located in coastal areas, since it keeps affecting their durability. This phenomenon, in synergy with moisture and high temperatures, leads to premature deterioration of the structures. Under these conditions, the need for management of the problem of resistance of steel against corrosion is an issue of paramount importance and a challenge to the structural integrity and reliability. The paper aims to discuss these issues. Design/methodology/approach The need for management of the problem of resistance of steel against corrosion is an issue of paramount importance and a challenge to the structural integrity and reliability. In the present study, an effort was made to increase the corrosion resistance of the high strength and ductility dual-phase steel B500c category, with the use of different shot blasting processes, without any interference in the chemical composition or in the production mode. In particular, shot blasting treatment was used for both cleaning and creating compressive stresses on the surface of steel bars, according to the pertinent protocols. The modified samples were studied via both conventional characterization methods and electrochemical techniques. Findings Through the whole surface treatment process of B500c steel, a positive impact came about not only the corrosion resistance, but also the mechanical performance. Originality/value Shot blasting process aims to increase the corrosion resistance of high ductility dual-phase steel (B500c), without any interference in the chemical composition or in the production mode.

scholarly journals Effect of Martensite Morphologies on Corrosion in 5% H2SO4 Solution of Borided X70 Dual Phase Steel

2021 ◽  
Vol 45 (1) ◽  
pp. 69-74
Author(s):  
Tassi Hocine ◽  
Zidelmel Sami ◽  
Allaoui Omar
Keyword(s):  
Corrosion Resistance ◽  
Dual Phase Steel ◽  
Annealing Temperature ◽  
Intercritical Annealing ◽  
Ferrite Matrix ◽  
Dual Phase ◽  
H2so4 Solution ◽  
Dp Steel ◽  
Direct Quenching ◽  
Step Quenching

In the present investigation, some electrochemical properties of dual phase X70 steels with different martensite morphologies which have undergone boriding were studied. To obtain a variety of martensite morphologies, Direct Quenching (DQ), Intermediate Quenching (IQ) and Step Quenching (SQ) heat treatments were applied at an intercritical annealing temperature (IAT) of 760℃. The treatment (DQ) allowed the formation of fine martensite evenly distributed in the ferrite matrix. (IQ) treatment showed the formation of martensite along the ferrite / ferrite grain boundaries. In contrast, treatment (SQ) induced the formation of a banded morphology of martensite and ferrite. The realization of borides on X70 (DP) steel was carried out in a powder mixture containing 5% of B4C as source of boron, 5% of NaBF4 as activator and 90% of SiC as diluent at 950℃ for a period of time from 4 h. The corrosion behavior of X70 (DP) steel has been explored by the Tafel extrapolation method in a 5 wt. % H2SO4 solution. The corrosion resistance of steel which has undergone boriding (BDP) is higher than that of steel which has not undergone it (DP).

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.

Enhancement of corrosion protection of low nickel austenitic stainless steel by electroactive polyimide-CuO composites coating in chloride environment

2019 ◽  
Vol 66 (6) ◽  
pp. 774-781 ◽  
Author(s):  
Jeetendra Kumar Malav ◽  
Ramesh C. Rathod ◽  
Vipin Tandon ◽  
Awanikumar P. Patil
Keyword(s):  
Stainless Steel ◽  
Corrosion Resistance ◽  
Copper Oxide ◽  
Corrosion Protection ◽  
Electrochemical Techniques ◽  
Ultra Violet ◽  
Austenitic Stainless Steels ◽  
Inorganic Filler ◽  
Content Type ◽  
Anticorrosion Performance

Purpose The purpose of this study is to improve the anticorrosion performance of low nickel stainless steel (AISI 201) in 3.5% NaCl by electroactive polyimide/copper oxide (EPI/CuO) composites coating. Design/methodology/approach Electroactive polyimide/copper oxide (EPI/CuO) composites were prepared by oxidative coupling polymerization followed by thermal imidization method. Findings The functional and structural properties of composites were characterized by X-ray diffraction, Fourier transmission infra-red and ultra violet-visible spectroscopy and the surface topography was characterized by field emission scanning electron microscope analysis and anticorrosion performance in 3.5 Wt.% NaCl was evaluated by electrochemical techniques. The obtained results of electrochemical techniques measurement indicated that the composites coated samples give better corrosion protection against attacking electrolyte. Originality/value The ever-increasing price of nickel (Ni) is driving the industries to use low-Ni austenitic stainless steels (ASSs). However, it exhibits relatively poor corrosion resistance as compared with conventional Cr-Ni ASSs. Nonetheless, its corrosion resistance can be enhanced by polymeric (electroactive polyimide [EPI]) coating. CuO particles exhibit the hydrophobic properties and can be used as inorganic filler to incorporate in EPI to further enhance the corrosion protection. The present research paper is beneficial for industries to use low-cost AISI 201, enhance its corrosion resistance and replace the use of costly conventional Cr-Ni ASSs.

VAN QN (80)

Alloy Digest ◽  
1980 ◽  
Vol 29 (5) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Yield Strength ◽  
Dual Phase Steel ◽  
Heat Treating ◽  
Lower Bainite ◽  
Dual Phase ◽  
Great Weight ◽  
Automotive Parts ◽  
High Work ◽  
Equivalent Yield

Abstract VAN QN (80) is a dual-phase steel with an equivalent yield strength of 80,000 psi and an exceptional combination of strength, formability, weldability, toughness and fatigue resistance. A dual-phase steel is one whose microstructure primarily consists of a mixture of ferrite and martensite or lower bainite. The high work-hardneing rate of VAN QN (80) permits the development of high strengths in formed parts in combination with excellent formability. Great weight savings have been achieved by its use for a number of automotive parts. This datasheet provides information on composition, physical properties, elasticity, and tensile properties as well as fatigue. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: SA-373. Producer or source: Jones & Laughlin Steel Corporation.

Effect of Niobium on Zn-Coated Dual Phase Steel Sheet

2007 ◽  
Vol 539-543 ◽  
pp. 4411-4416 ◽  
Author(s):  
Shunichi Hashimoto
Keyword(s):  
Chemical Composition ◽  
Steel Sheet ◽  
Dual Phase Steel ◽  
Ferrite Matrix ◽  
Dual Phase ◽  
Dp Steel ◽  
Steel Sheets ◽  
Structural Parts ◽  
Bake Hardenability ◽  
Grade Steel

Dual Phase (DP) steel sheets, mainly 590 MPa TS grade steel, have been applied to structural parts of automobile because of their good formability, large bake hardenability and high crash worthiness. Although the concept of DP steel was established as early as the mid-1970th, the literature contains little discussion of Zn-coated DP steel, which has been the main application in recent years. In manufacturing Zn-coated DP steel, chemical composition which secures adequate Zn coatability and appropriate heat cycles, including galvannealing, must be considered. In this paper, the effect of Nb on the tensile properties, stretch flange formability and bake hardenability of 590 MPa TS grade DP steel is discussed. The base chemical composition was 0.05%C-2%Mn-0.5%Cr steel. The effect of Nb on the above-mentioned properties was studied using 0.05%Nb added steel and found that the addition of 0.05%Nb results in improved elongation, stretch flangeability and bake hardenability with higher tensile strength under both simulated GA and GI heat cycles. These improved properties by the addition of Nb are brought about by the grain refinement of ferrite matrix and finer dispersion of martensite.

Enhanced corrosion resistance of Cr-Mn ASS by low temperature salt bath nitriding technique for the replacement of convectional Cr-Ni ASS

2019 ◽  
Vol 66 (4) ◽  
pp. 439-445 ◽  
Author(s):  
Vipin Tandon ◽  
Awanikumar P. Patil ◽  
Ramesh C. Rathod
Keyword(s):  
Corrosion Resistance ◽  
Low Temperature ◽  
Electrochemical Impedance ◽  
Electrochemical Techniques ◽  
Austenitic Stainless Steels ◽  
Salt Bath ◽  
Potassium Nitrate ◽  
Industrial Applications ◽  
Content Type ◽  
Salt Bath Nitriding

Purpose The purpose of this paper is to enhance the corrosion resistance of Cr-Mn austenitic stainless steel (ASS) via low temperature salt bath nitriding and to replace the convectional Cr-Ni ASS with newly developed enhanced corrosion resistive Cr-Mn ASS. Design/methodology/approach The low temperature salt bath nitriding was performed on Cr-Mn ASS at 450°C for 3 h in potassium nitrate salt bath. Findings The present paper compares the corrosion resistance of salt bath nitrided Cr-Mn ASS with convectional Cr-Ni ASSs (316 L and 304 L ASSs) in 3.5 per cent NaCl by electrochemical techniques. The electrochemical impedance spectroscopy result shows the increase in film resistance and potentiodynamic polarization results show the enhanced corrosion resistance of nitrided Cr-Mn ASS, which is almost equivalent to that of 316 L and 304 L ASSs. This is attributed to the formation of nitrogen supersaturated dense nitride layer. The present results therefore suggest that the nitrided Cr-Mn ASS may replace costly convectional Cr-Ni ASSs for commercial and industrial applications. Originality/value Ever-increasing price of nickel (Ni) is driving the industries to use Ni-free or low-Ni austenitic stainless steels (ASSs). But its corrosion resistance is relatively poor as compared to conventional Cr-Ni ASSs. However, its corrosion resistance can be improved by nitriding. The low temperature salt bath nitriding of Cr-Mn ASS and its electrochemical behavior in 3.5 per cent NaCl has not been studied. The present research paper is beneficial for industries to use low cost Cr-Mn, enhance its corrosion resistance and replace the use of costly conventional Cr-Ni ASSs.

Corrosion Behavior of ZnAlMg Coating of Dual Phase Steel Sheet

2014 ◽  
Vol 881-883 ◽  
pp. 1275-1279
Author(s):  
Xiao Dong Hao ◽  
Qi Fu Zhang
Keyword(s):  
Corrosion Resistance ◽  
Rust Resistance ◽  
Steel Sheet ◽  
Dual Phase Steel ◽  
Salt Spray ◽  
Dual Phase ◽  
Neutral Salt ◽  
High Corrosion Resistance ◽  
Products Analysis ◽  
Resistance Performance

The effect of different composition ratio of ZnAlMg coatings on the corrosion resistance of dual phase steel sheet was experimental studied. The results of neutral salt spray test and corrosion products analysis showed that the three kinds of ZnAlMg coatings have different rust resistance performance. Both the Zn6Al3Mg and Zn13.5Al1.5Mg coatings have high corrosion resistance than the pure Zn coating. The Zn13.5Al1.5Mg coating has better anticorrosion performance than the Zn6Al3Mg coating.

Sign in / Sign up

Export Citation Format

Share Document