Bovard F.S.,Alcoa |
Smith K.A.,Auto Technology Co. |
Courval G.J.,Novelis Inc. |
Jafolla T.,General Motors |
And 3 more authors.
SAE International Journal of Passenger Cars - Mechanical Systems | Year: 2010
Over the past several years a task group within the SAE Automotive Corrosion and Protection (ACAP) Committee has conducted extensive on-vehicle field testing and numerous accelerated lab tests with the goal of establishing a standard accelerated test method for cosmetic corrosion evaluations of finished aluminum auto body panels. This project has been a cooperative effort with OEM, supplier, and consultant participation and was also supported in part by DOE through USAMP (AMD 309). The focus of this project has been the identification of a standardized accelerated cosmetic corrosion test that exhibits the same appearance, severity, and type of corrosion products that are exhibited on identical painted aluminum panels exposed to service relevant environments. Multi-year service relevant exposures were conducted by mounting panels on-vehicles in multiple locations in the US and Canada. The accelerated tests have been ranked based on their relevance to the on-vehicle results and ASTM G85-A2 has been identified as the test method that most consistently replicates on-vehicle cosmetic corrosion performance. Comments concerning test reproducibility are included. © 2010 SAE International.
Singleton R.,Singleton Corporation
Metal Finishing | Year: 2012
Accelerated corrosion testing of metals and coatings was first developed in the late 1890s and early 1900s for testing products to increase their useful performance and service life. This method of testing the corrodibility of ferrous and nonferrous metals and organic and inorganic coatings has since been improved and variations added to better test new materials and help operators understand how they may perform in, and withstand, a wider range of real world environments. The usefulness of testing coatings for resistance to water, or high humidity, as a good indicator of their service life in service environments of that type resulted in the ASTM D1735 Standard Practice for Testing Water Resistance of Coatings Using Water Fog Apparatus and the ASTM D2247 Standard Practice for Testing Water Resistance of Coatings in 100% Relative Humidity. Other considerations to consider when choosing or specifying a particular accelerated corrosion test include the multitude of environments and customer demands faced by a product and industry.
Singleton R.,Singleton Corporation |
Singleton E.,Singleton Corporation
Metal Finishing | Year: 2011
Barrel plating has distinct advantages: the ability to finish a larger variety of work and producing a greater volume of work for a specified time period over what is generally possible from a rack-type finishing line. By incorporating as many aspects of the previously mentioned information as possible, the capacity and capability of a barrel finishing production line can be optimized.