Material degradation of cfrp-to-steel joints subjected to salt fog

Yang, Yongming; Chastre, Carlos; Silva, R. J. C.

doi:10.1016/j.compositesb.2019.05.095

Cited by 18 publications

(7 citation statements)

References 33 publications

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“…A double flat electrode cell (F031, AMETEK, Oak Ridge, TN, USA) was used with a 100 mL 5.0 wt.% NaCl aqueous solution as the electrolyte. This double flat electrode cell experiment provides different information compared to the common galvanic corrosion test experiment [7,9]. This experiment was conducted on a galvanic corrosion test instrument without directly connecting the CFRP and SPCC specimens.…”

Section: Galvanic Corrosionmentioning

confidence: 99%

“…Furthermore, galvanic corrosion has been primarily investigated for metallic materials. However, in recent years, as the use of composite materials such as CFRP, a non-metallic material, has increased, the investigation of galvanic corrosion between metallic-nonmetallic coupled materials has garnered interest [7,9].…”

Section: Galvanic Corrosionmentioning

confidence: 99%

“…The electrochemical properties of the samples with varying surface conditions were evaluated via a salt test (5.0 wt.% NaCl aqueous solution). The microstructural and compositional changes after electrochemical evaluation were analyzed to establish the applicability of CFRP and SPCC as multi-materials in automotive parts [7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

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Effects of Surface Roughness on the Electrochemical Properties and Galvanic Corrosion Behavior of CFRP and SPCC Alloy

Kim¹,

Yoo

Moon

2020

Materials

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This study investigated the potentiodynamic corrosion behavior of carbon fiber reinforced plastic (CFRP) and automotive rolled mild steel alloy (SPCC alloy) under different surface roughness conditions. Electrochemical characterization was performed using a potentiodynamic corrosion test with 5.0 wt.% NaCl aqueous solution at 25 ± 2 °C, while microstructural and compositional changes before and after corrosion were evaluated using field emission scanning electron microscopy (FE-SEM) and energy dispersive spectroscopy (EDS), respectively. The CFRP and SPCC corrosion rate increased as surface roughness increased. Generally, SPCC corroded faster than CFRP. The surface composition of CFRP was not affected by corrosion, regardless of the surface roughness conditions. Conversely, SPCC exhibited remarkable changes due to the formation of oxides, and its corrosion was more severe than that of CFRP as surface roughness increased. We used a double flat electrode cell to conduct a galvanic corrosion test in this study at 25 ± 2 °C. In this galvanic corrosion test, we studied different kinds of surface roughness for SPCC specimens under the CFRP material in its as-received condition and #200 condition. We confirmed that the results of galvanic corrosion for this study have a difference in corrosion amount and corrosion rate of SPCC specimens according to the surface roughness of CFRP.

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Section: Galvanic Corrosionmentioning

confidence: 99%

Section: Galvanic Corrosionmentioning

confidence: 99%

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Effects of Surface Roughness on the Electrochemical Properties and Galvanic Corrosion Behavior of CFRP and SPCC Alloy

Kim¹,

Yoo

Moon

2020

Materials

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“…[1][2][3] For the past three decades, a considerable number of laboratorial experiments in this field have been conducted to measure the mechanical and durability properties of those reinforcement structures. [4][5][6][7][8][9][10][11] The resultant data has shown that that the joints represent the critical zone for these reinforced steel structures, acting in most cases as the weak link. That is, the bond properties effectively control the load-carrying capacity of the CFRP strengthening/rehabilitated steel structures.…”

Section: Introductionmentioning

confidence: 99%

Determination of fracture toughness of an adhesive in civil engineering and interfacial damage analysis of carbon fiber reinforced polymer–steel structure bonded joints

Yang

Zhao

Zhang

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part L:

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Carbon fiber reinforced polymer–steel structural bonded joints are often subject to mixed-mode loading i.e. coupling action of normal and shear stress occurs in the joints. In this paper, an experimental approach based on fracture mechanics was adopted to obtain the fracture toughness (GΙC and GΙΙC) of an adhesive currently employed in civil engineering applications, with the corresponding pure cohesive models verified by numerical results. Furthermore, feasibility of the mixed-mode cohesive model for the current adhesive was validated through comparison of numerical and experimental results of carbon fiber reinforced polymer–steel single-lap joints. Finally, based on the validated mixed-mode cohesive model, the interfacial damage of carbon fiber reinforced polymer–steel beam joints was analyzed using the finite element method, accounting for the long-term degradation that can occur in the joint materials i.e. carbon fiber reinforced polymer and adhesive. The work in this paper can provide some useful data such as the fracture properties of the adhesive and shed some light on the design optimization of carbon fiber reinforced polymer–steel structure joints as well as the estimation of its long-term interfacial behavior when in service in civil engineering applications.

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“…Yang et al investigated the effects of salt fog on CFRP-steel bonded joints over a cycle of 5000 h and assessed degradation of bond capacity at selected time intervals. [9] Different mechanisms causing strength losses were found and analyzed, including galvanic corrosion due to coupling between CFRP and steel.…”

Section: Introductionmentioning

confidence: 99%

One‐Step Process for Press Hardened Steel–Carbon Fiber Reinforced Thermoset Polymer Hybrid Parts

Taylor

Penney

2020

steel research int.

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A new one‐step process for manufacturing press hardened steel–carbon fiber reinforced (thermoset) polymer hybrid parts with potential for reduced cycle time, infrastructure requirements, and energy consumption compared with traditional two‐ and three‐step processes is developed. The process combines and optimizes the press hardening and prepreg compression molding technologies, traditionally used in isolation for manufacturing press hardened steel and carbon fiber reinforced polymer parts, respectively, to produce hybrid parts in a one‐step, fully integrated process. Heat required for curing and bonding prepreg to steel is provided by residual heat of the steel part immediately following hot forming and interrupted die‐quenching of steel. Thermal conductivity of tool material is investigated to achieve the optimal balance between die‐quenching rate for martensite formation in steel and temperature maintenance for complete curing and bonding of prepreg. Addition of epoxy adhesive and thickness ratio between steel and prepreg are also investigated. Benchmarking is conducted against parts manufactured by the traditional two‐step process, in which the press hardened steel part is formed in isolation before joining with the carbon fiber reinforced polymer part. No sacrifice of part quality is found from the new one‐step process with no loss of mechanical performance, despite clear economic and environmental advantages.

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Material degradation of cfrp-to-steel joints subjected to salt fog

Cited by 18 publications

References 33 publications

Effects of Surface Roughness on the Electrochemical Properties and Galvanic Corrosion Behavior of CFRP and SPCC Alloy

Effects of Surface Roughness on the Electrochemical Properties and Galvanic Corrosion Behavior of CFRP and SPCC Alloy

Determination of fracture toughness of an adhesive in civil engineering and interfacial damage analysis of carbon fiber reinforced polymer–steel structure bonded joints

One‐Step Process for Press Hardened Steel–Carbon Fiber Reinforced Thermoset Polymer Hybrid Parts

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