Characteristic properties of base coat of automobile paint: enhancement in scratch and abrasion resistance by nanoscale reinforcement—a review

Mohanty, Debasmita; Kanny, M. K.; Mohanty, Smita; Nayak, Sanjay K.

doi:10.1007/s00289-022-04081-w

Cited by 2 publications

(2 citation statements)

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“…Of the vast majority, automotive coatings are composite polymer films with a multilayer structure of clearcoat, basecoat, primer, electro coat, etc., which mainly provide vehicles with brilliant color and a glossy appearance, ref. [ 1 ] and also play an important role in protecting the underside of metal car bodies [ 2 , 3 , 4 , 5 , 6 ]. However, as car bodies are inevitably scratched in everyday use, scratch resistance is essential in guaranteeing the proper functioning of automotive coatings.…”

Section: Introductionmentioning

confidence: 99%

“…Scratch-induced damage in automotive coatings involves failure at the basecoat/primer interface, as emphasized in [ 7 , 16 ]. Scratches involving delamination usually create irreversible damage in the coating system compared to surface fractures, which are relatively easy to repair [ 5 ]. Generally, the weak interface bonding performance of multilayer polymeric structures makes them more vulnerable to scratch-induced delamination [ 25 ].…”

Section: Introductionmentioning

confidence: 99%

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Effects of Interlaminar Failure on the Scratch Damage of Automotive Coatings: Cohesive Zone Modeling

et al. 2023

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Interlaminar failure caused by scratches is a common damage mode in automotive coatings and is considered the potential trigger for irreversible destruction, i.e., plowing. This work strives to numerically investigate the mechanisms responsible for the complex scratch behavior of an automotive coating system, considering the interfacial failure. A finite element model is developed by incorporating a large deformation cohesive zone model for scratch-induced debonding simulation, where the mass scaling technique is utilized to minimize computational burden while ensuring accuracy. The delamination phenomenon of the automotive coating is reproduced, and its effects on scratch damage behavior are analyzed. Accordingly, it is revealed that the interlaminar delamination would produce significant stress redistribution, which leads to brittle and ductile damage of the coating and consequently affects the formation of plowing. Eventually, parametric studies on the effects of interfacial properties are performed. They demonstrate that the shear strength and shear fracture energy dominate scratch-induced delamination.

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