A Study on Chipping Failure of Automotive Coatings

By utilizing a high-speed photographic machine, we successfully observed the very moment that the coated films got destructed by so-called “chipping.” A high-speed steel ball was shot onto multiple coating films, when the impact energy was consumed for an extremely short time, i.e. about 1/1000 second and the energy has caused film destructions and/or detachment between film layers and/or vibration absorption. There was a good correlation in destruction of coated films between the high-speed steel ball impact test and the conventional gravel impact test, the latter of which is commonly employed for evaluation of chipping resistance. Moreover, for a prediction of chipping resistance by viscoelastic property of coated dry films, the observation of high-speed film deformation was very effective as a means of chipping analysis. The relaxation spectrum, being obtained from frequency-temperature variance in dynamic viscoelasticity measurement, was highly correlative to anti-chipping performance.

• Record URL:
  • https://doi.org/10.4271/2003-01-2811
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/01487191
• Supplemental Notes:
  • Abstract reprinted with permission of SAE International.
• Authors:
  • Tanaka, Takeshi
  • Mizutani, Yutaka
  • Sugai, Hideo
  • Nakamura, Shigeru
  • Hara, Yoshinori
• Conference:
  • International Body Engineering Conference & Exposition
  • Location: Detroit Michigan, United States
  • Date: 1998-9-29 to 1998-10-1
• Publication Date: 1998-2-23

Language

• English

Media Info

• Media Type: Web
• Serial:
  • SAE Technical Paper
  • Publisher: Society of Automotive Engineers (SAE)
  • ISSN: 0148-7191
  • EISSN: 2688-3627
  • Serial URL: http://papers.sae.org/

Subject/Index Terms

• TRT Terms: Coatings; Colorants; Crash tests; Drag; Finishes; Steel; Vibration
• Subject Areas: Highways; Vehicles and Equipment;

Filing Info

• Accession Number: 01803568
• Record Type: Publication
• Source Agency: SAE International
• Report/Paper Numbers: 2003-01-2811
• Files: TRIS, SAE
• Created Date: Dec 9 2021 10:24AM