Corrosion avoidance in lightweight materials for automotive applications

Liu, Ming; Guo, Yang; Wang, Jeff; Yergin, Mark

doi:10.1038/s41529-018-0045-2

Cited by 65 publications

(28 citation statements)

References 26 publications

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“…Hence, promoting the understanding of the fundamental principles of corrosion behavior paves the path to further enhancement of corrosion protection for Mg and extends its industrial application. [1][2][3] It has been extensively acknowledged that hydrogen evolution reaction (HER) is the main cathodic reaction during Mg corrosion at neutral or even alkaline conditions unlike other metals (zinc, iron etc. ), where oxygen reduction reaction (ORR) is the main cathodic process.…”

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confidence: 99%

High rate oxygen reduction reaction during corrosion of ultra-high-purity magnesium

et al. 2020

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Comprehending the corrosion mechanism of magnesium is of major interest in diverse fields. Typically, hydrogen evolution reaction is considered as the only cathodic reaction during Mg corrosion. However, recent works demonstrate importance of considering oxygen reduction reaction (ORR) as a second cathodic process at specific conditions. With oxygen micro-optode, we show that ORR rate was higher on slower corroding ultra-high-purity Mg (UHP-Mg), while lower on faster corroding commercially pure Mg (CP-Mg), where massive hydroxide layer impeded oxygen permeation. These findings shed light on yet another facet of complex mechanism of Mg corrosion.

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confidence: 99%

High rate oxygen reduction reaction during corrosion of ultra-high-purity magnesium

et al. 2020

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“…Self-piercing rivets (SPRs), a type of mechanical fastener for joining sheet materials, are considered as a high potential solution for CFRP/metal joining [ 9 , 10 , 11 ]. Unlike conventional SPR specimens, the hole drilling of CFRP is required to avoid galvanic corrosion of the rivet interface between CFRP and metal [ 12 , 13 ]. In particular, pre-hole machining is regarded as essential for SPR application to high-tension steel plates (HTSP), for the purpose of enhancing the safety of motor vehicles.…”

Section: Introductionmentioning

confidence: 99%

Green Picosecond Laser Machining of Thermoset and Thermoplastic Carbon Fiber Reinforced Polymers

et al. 2021

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There has been an increase in demand for the development of lightweight and high-strength materials for applications in the transportation industry. Carbon fiber reinforced polymer (CFRP) is known as one of the most promising materials owing to its high strength-to-weight ratio. To apply CFRP in the automotive industry, various machining technologies have been reported because it is difficult to machine. Among these technologies, picosecond laser beam-induced machining has attracted great interest because it provides negligible heat transfer and can avoid tool wear. In this work, we conducted and compared machining of 2.15 mm-thick thermoset and 1.85 mm-thick thermoplastic CFRPs by using a green picosecond laser. The optimized experimental conditions for drilling with a diameter of 7 mm led to a small taper angle (average ~ 3.5°). The tensile strength of the laser-drilled specimens was evaluated, and the average value was 570 MPa. Our study indicates that green picosecond laser processing should be considered as a promising option for the machining of CFRP with a small taper angle.

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“…Water, along with dirt, can enter the ball joint fittings and initiate corrosion, which can cause the front lower control arm to separate from the vehicle. This would make it more difficult to drive, thus increasing the risk of an accident [ 2 ]. Problems can occur when joining different materials.…”

Section: Introductionmentioning

confidence: 99%

Degradation of Components in Cars Due to Bimetallic Corrosion

et al. 2021

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This paper deals with the determination of the basic corrosion characteristics of metallic materials used as components in car construction to achieve a lighter vehicle with higher rigidity, a more complex “hybrid” of diverse materials is needed for the car body structure. Due to the different types of material used in the manufacture of components and their interactions, the issue of assessing the impact of bimetallic corrosion is currently relevant. Based on the potential difference at the end of the corrosion test, it was possible to determine the “anode index”, which determines the risk of degradation of materials due to bimetallic corrosion. In our case, a hot-galvanized steel sheet/Al alloy EN AW-6060 couple in deicing salt and hot-galvanized steel sheet/steel S355J0 couple in simulated acid rain solution (SARS) has proven to be “safest” and usable even for more aggressive environments. Hot-galvanized steel sheet/Al alloy EN AW-6060 in SARS solution is suitable for slightly aggressive environments. Stainless steel AISI 304/silumin A356 in deicing salt, stainless steel AISI 304/Al alloy EN AW-6060 in deicing salt, and stainless steel AISI 306/Al alloy EN AW-6060 in simulated exhaust gas environment (SEG solution) are not suitable for non-aggressive environments.

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Corrosion avoidance in lightweight materials for automotive applications

Cited by 65 publications

References 26 publications

High rate oxygen reduction reaction during corrosion of ultra-high-purity magnesium

High rate oxygen reduction reaction during corrosion of ultra-high-purity magnesium

Green Picosecond Laser Machining of Thermoset and Thermoplastic Carbon Fiber Reinforced Polymers

Degradation of Components in Cars Due to Bimetallic Corrosion

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