Welcome Guest to Coatings World    Login || Register
Last Updated Friday, December 19 2014
Print RSS Feed

BASF and OEMs Develop Faster & More Accurate ASTM Test Standard for Transportation Coatings



Published January 16, 2014
Related Searches: Color
A collaborative 14-year effort involving BASF, automotive and aerospace original equipment manufacturers (OEMs), material suppliers and test equipment manufacturers has resulted in a new American Society for Testing and Materials (ASTM) test standard for transportation coatings.

The new method is 30 to 40 percent faster than the previous test standard used for many OEMs, and improves the accuracy to nearly 100 percent in predicting coating service life compared to less than 50 percent with the previous standard. Industry implementation of this new test can speed new product development, and aid in the development of better overall products for the coating industry. This test can be used for automobiles, aircrafts, trucks and rail cars.

Officially named ASTM D7869-13 Standard Practice for Xenon Arc Exposure Test with Enhanced Light and Water Exposure for Transportation Coatings, the new test simulates physical and environmental stresses that an exterior transportation coating is exposed to in a subtropical climate. These stresses include long water exposures, wet/dry cycling, and high dosages of solar radiation, all of which have been shown to cause severe coatings deterioration.

The new test conditions consist of a primary test cycle and a sub-cycle. The primary test includes two long water exposures and a single, long light exposure with precise spectral match to daylight. The sub-cycle consists of shorter alternating water and light exposures and is designed to simulate cyclic stresses such as cracking and surface erosion.

These two cycles are designed to replicate the common types of coatings failures driven by the interaction of photo-oxidation during daylight and hydrolysis during water exposure. Together, these failures can lead to gloss loss, color change, adhesion, blistering and cracking.

BASF has been active in the ASTM D-01 committee on accelerated weathering for many years, and began efforts in test development in response to a customer issue. BASF brought key partners together, developed the critical coating formulas for testing, and conducted several important experiments in the physical test laboratories, which resulted in the new test method. 


blog comments powered by Disqus
Receive free Coatings World emails
Sign up now to receive the weekly newsletter, and more!

Enter your email address:
Company Spotlight
BASF Corporation
100 Campus Drive
Florham Park, NJ, 07932
US
View Profile
Houchi Chemical Co., Ltd
No.56, Fu Chow Street
Taipei, Taipei, 100
Taiwan
View Profile
Lubrizol Advanced Materials, Inc.
9911 Brecksville Road
Cleveland, OH, 44141
US
View Profile
Shamrock Technologies, Inc.
Foot of Pacific Street
Newark, NJ, 07114
USA
View Profile
Sunin Machine Co., Ltd.
No.96, Chiao Ho Rd ,Chungho Dist
New Taipei City, Taiwan , 235
Taiwan Roc
View Profile
Keeneyes
18F, No.85, Sec. 1, Chung-Shiao E. Rd.
Taipei, Taiwan, 100
R.O.C.
View Profile
AZ Electronic Materials Co., Ltd.
No. 458-6, Sinsing Road Hu Kou Township Hsinchu Country 303, Taiwan
Hsinchu Country, Taiwan, 303
Taiwan
View Profile
Micro Powders, Inc.
580 White Plains Rd.
Tarrytown, NY, 10591
US
View Profile
Siltech Corporation
225 Wicksteed Avenue
Toronto, ON, M4H 1G5
Canada
View Profile
Follow Coatings World On