Casse

Casson-Asbeck plots Casson equation Casson plots CASS test Castable urethanes Castanin... 

The CASS Test. In the copper-accelerated acetic acid salt spray (CASS) test (42), the positioning of the test surface is restricted to 15 2°, and the salt fog corrosivity is increased by increasing temperature and acidity, pH about 3.2, along with the addition of cupric chloride dihydrate. The CASS test is used extensively by the U.S. automobile industry for decorative nickel—chromium deposits, but is not common for other deposits or industries. Exposure cycle requirements are usually 22 hours, rarely more than 44 hours. Another corrosion test, now decreasing in use, for decorative nickel—chromium finishes is the Corrodkote test (43). This test utilizes a specific corrosive paste combined with a warm humidity cabinet test. Test cycles are usually 20 hours. 

By the methylation of commercial xylene and separation of the mesitylene from the mixture of hydrocarbons by crystallization of the sulfonate. Smith and Cass, J. Am. Chem. Soc. 54, 1603 (1932). 

Dibenzofuran [132-64-9] M 168.2, m 82.4 . Dissolved in diethyl ether, then shaken with two portions of aqueous NaOH (2M), washed with water, separated and dried (MgS04). After evaporating the ether, dibenzofuran was crystd from aq 80% EtOH and dried under vacuum. [Cass et al. J Chem Soc 1406 7958.] High purity material was obtained by zone refining. 

Sponsor Argonne National Lab, Environmental Assessment Division, Atmospheric Science Section, 9700 S. Cass Ave., Argonne, IL 60439. Developer University of Illinois, Dept, of Mechanical Engineering, 1206 W. Green, Urbana, IL 61801. Custodians D.F. Brown University of lUinois, Dept, of Mechanical Engineering, 1206 W. Green, Urbana IL 61801. Computer It runs on a 486, Pentium PC, or any workstation. The deterministic version runs (slowly) on a 386. The stochastic version of the code was originally written for a Sun Workstation. The PC version requires at least a 486, 33 MHz machine with a minimum of 10 MB of free hard disk space. Cost None ... 

Dennis, R., R. W. Cass, and R. S. Hall. Dust Dislodgement from Woven Fabrics Versus Filter Performance. ]. Air Pollution Control Assoc. 28, no. 1 (Jan. 1978), pp. 47-52. 

The editor also acknowledges with pleasure the encouragement and assistance he has received from Mr L. W. Derry (Head of Department of Metallurgy) and Dr D. M. A. Leggett (Principal) of the Battersea College of Technology, and from Dr A. M. Ward (Principal) of Sir John Cass College. 

The accelerated corrosion test in most general use is the CASS test in which the articles are sprayed intermittently with a solution made up as follows ... 

The test is much faster than the CASS test (see page 19 49) and is probably more reproducible more important is the fact that it has been correlated with service exposure. 

It has been shown that chromium is virtually unattacked by the CASS test solution Nickel, on the other hand, is corroded at a substantial rate (about 0-072mm/y), the presence of the copper ions tending to maintain the nickel in an active state . Thus, in the CASS test (and in the Corrodkote test as well) accelerated galvanic corrosion of the nickel occurs at any discontinuities in the chromium layer. Good correlation between the results of the CASS test and the performance of plated parts in service has been reported . 

Acetic acid salt spray test (ASS test) Copper-accelerated acetic acid salt spray test (CASS test)... 

Luston, J. and Cass, F. Anionic Copolymerization of Cyclic Ethers with Cyclic Anhydrides. Vol. 56, pp. 91-133. 

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