Cyclic behavior and hysteresis model of beam-column joint under salt spray corrosion environment

The effect of different alloying elements on corrosion behavior of copper alloys was investigated using electrochemical corrosion and salt spray corrosion test in NaCl solution. Cu-Ag has the most stable corrosion current in the potentiostatic scanning test, exhibiting a better corrosion resistant performance. It can be analyzed from corrosion surface morphologies that Cu-Ag presents exfoliation corrosion mechanism while Cu-Sn shows crevice corrosion mechanism. Cu-Mg has a complex corrosion process caused by multiple corrosion mechanism. In the salt spray corrosion test, the corrosion degree of Cu-Ag is lighter than those of Cu-Sn and Cu-Mg after 24h test. Therefore, the Cu-Ag alloy exhibits the best corrosion resistance in chloride solution.

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Friction Stir Welding of HSLA-65 Steel for Shipbuilding

Journal of Ship Production ◽

10.5957/jsp.2003.19.3.159 ◽

2003 ◽

Vol 19 (03) ◽

pp. 159-164 ◽

Cited By ~ 2

Author(s):

Paul J. Konkol ◽

James A. Mathers ◽

Richard Johnson ◽

Joseph R. Pickens

Keyword(s):

Friction Stir Welding ◽

Salt Spray ◽

Parent Material ◽

Visual Examination ◽

Ferrous Alloys ◽

Salt Spray Corrosion ◽

Friction Stir ◽

Transverse Tensile ◽

Bend Tests ◽

Transverse Weld

HSLA-65 (ASTM A945) is a new structural steel of interest to the Navy shipbuilding community. The feasibility of joining the alloy by the friction stir welding (FSW) process was assessed. Single-pass weldments in 6.4-mm plates and two-pass weldments in 12.7-mm plates were successfully made. The FS weldments were evaluated by performing transverse tensile and bend tests; hardness, Charpy V-notch toughness, and salt spray corrosion testing; and metallographic evaluations. The weldments exhibited satisfactory transverse weld tensile strength, ductility, Charpy Vnotch toughness, and hardness. Visual examination revealed no difference in salt spray corrosion rates between the stir zone, the heat-affected zone, and the parent material. The results indicate that FSW does indeed have potential for joining ferrous alloys in shipbuilding, which should promote further efforts in this area.

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MATERIAL - FINISHES AND COATINGS - PRIMER PIGMENTS SALT SPRAY CORROSION RESISTANCE

10.21236/ad0409445 ◽

1956 ◽

Author(s):

L. A. Mappus ◽

R. H. Whidden ◽

W. M. Sutherland

Keyword(s):

Corrosion Resistance ◽

Salt Spray ◽

Salt Spray Corrosion

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Effects of mass ratios on salt spray corrosion and electrochemical corrosion behaviors of laser cladded Cr–Ni coatings

Anti-Corrosion Methods and Materials ◽

10.1108/acmm-10-2018-2015 ◽

2019 ◽

Vol 66 (3) ◽

pp. 352-359

Author(s):

Li Jiahong ◽

Kong Dejun

Keyword(s):

Corrosion Resistance ◽

Laser Cladding ◽

Salt Spray ◽

Electrochemical Corrosion ◽

Corrosion Mechanism ◽

H13 Steel ◽

Content Type ◽

Salt Spray Corrosion ◽

Electrochemical Tests ◽

Mass Ratios

Purpose The purpose of this paper is to improve the salt spray corrosion and electrochemical corrosion performances of H13 hot work mould steel, Cr–Ni coatings with the different Cr and Ni mass ratios are fabricated using a laser cladding (LC), which provides an experimental basis for the surface modification treatment of H13 steel. Design/methodology/approach Cr–Ni coatings with the different Cr and Ni mass ratios were firstly fabricated on H13 hot work mould steel using a laser cladding (LC). The salt spray corrosion (SSC) and electrochemical corrosion performances of Cr–Ni coatings in 3.5 Wt.% NaCl solution were investigated to analyze the corrosion mechanism, and the effect of mass ratios of Cr and Ni on their corrosion mechanism was discussed. Findings The laser cladded Cr–Ni coatings with the different Cr and Ni mass ratios are composed of Cr–Ni compounds, which are metallurgically combined with the substrate. The SSC resistance of Cr–Ni coating with the Cr and Ni mass ratios of 24:76 is the highest. The electrochemical corrosion resistance of Cr–Ni coating with the Cr and Ni mass ratio of 24:76 is the best among the three kinds of coatings. Originality/value In this study, the corrosion resistance of laser cladded Cr–Ni coatings with the Cr and Ni mass ratios of 17: 83, 20: 80 and 24: 76 was first evaluated using salt spray corrosion (SSC) and electrochemical tests, and the effect of mass ratios of Cr and Ni on their corrosion mechanism was discussed.

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