Parameterization of Stainless Steel Rebars to Improve Bonding Strength in Masonry Repairing

Micropores were formed on the surfaces of stainless steel (SUS) by sandblasting methods and Apatite Nuclei (AN) were formed in the pores. By this treatments, a bioactive SUS was fabricated. Apatite-forming ability of the SUS was evaluated by immersing in an acellular simulated body fluid. Formation of bonelike apatite was induced on the surface of the SUS within 1 day. High bonding strength of the bonelike apatite layer was achieved by a mechanical interlocking effect between the bonelike apatite formed in the pores and the SUS specimen.

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Stainless Steel Coatings for Corrosion Protection of Steel Rebars

Thermal Spray 1996: Proceedings from the National Thermal Spray Conference ◽

10.31399/asm.cp.itsc1996p0193 ◽

1996 ◽

Author(s):

B. Arsenault ◽

P. Gu ◽

J.G. Legoux ◽

B. Harvey ◽

J. Fournier

Keyword(s):

Stainless Steel ◽

Carbon Steel ◽

Salt Spray ◽

Chloride Ions ◽

Metallographic Examination ◽

316 L Stainless Steel ◽

Parking Garages ◽

Coating Microstructure ◽

Stainless Steel Coatings ◽

Steel Rebars

Abstract Steel reinforcement corrosion is one of the most serious causes of the premature deterioration of North American bridges and parking garages. Carbon steel rebars are very vulnerable to corrosion in salt contaminated concrete from deicing or coastal environment since the chloride ions induce severe corrosion as they reach the reinforcing steel rebars and depassivate the carbon steel. This paper evaluates the potential of using stainless steel coatings as a means to protect steel rebars from corrosion, especially in a salt contaminated concrete environment. The 316 L stainless steel coated coupons and rebars were prepared using Arc-sprayed and HP/HVOF processes. The corrosion performance of coatings were evaluated using linear polarization, a.c. impedance and salt spray techniques. Metallographic examination was also performed to characterize the coating microstructure.

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The Impact of Surface Treatment and Degree of Vacuum on the Interface and Mechanical Properties of Stainless Steel Clad Plate

Materials ◽

10.3390/ma11091489 ◽

2018 ◽

Vol 11 (9) ◽

pp. 1489 ◽

Cited By ~ 6

Author(s):

Ying-ying Feng ◽

Huan Yu ◽

Zong-an Luo ◽

Guang-ming Xie ◽

R. Misra

Keyword(s):

Mechanical Properties ◽

Stainless Steel ◽

Surface Treatment ◽

Bonding Strength ◽

National Standard ◽

Vacuum Degree ◽

Composite Oxides ◽

Interfacial Bonding Strength ◽

Stainless Steel Clad Plate ◽

The Impact

In this study, the impact of different surface treatment and degree of vacuum on the interface and mechanical properties of 304/Q345 stainless steel clad plate was investigated. The study indicated that more continuous or aggregated Al2O3 and Si-Mn composite oxides were formed at the interface after brush grinding. However, less inclusions such as Al2O3, MnS and Ca-Mg-Al-Si composite oxides were formed at the interface after pickling treatment. For the vacuum degrees of 10−2 Pa, 1 Pa and 105 Pa, the oxidation reaction became more intense with the decrease in vacuum degree. The interface inclusions were gradually changed from Al2O3 and Si-Mn complex oxides to oxide scale and MnCr2O4 spinel oxide. The interfacial bonding strength of stainless steel clad plate was improved with the increase in degree of vacuum. The bonding strength was 55 MPa at vacuum of 105 Pa, but it was 484 MPa at vacuum of 10−2 Pa, which is far greater than that of the national standard, and an excellent performance was obtained.

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