Tantalum lined reactor vessels which will hold most acidic corrosives up to the limit of current test temperatures have been studied, according to a recent issue of “Industrial Research Newsletter” published by Armour Research Foundation of Illinois Institute of Technology.
The unit tested was a 30-gallon, 1000-pound vessel with ⅝-inch thick Type 430 stainless steel Avails and a 0.030-inch tantalum lining.
Another item in the newsletter described improved specifications for vanadium which include reduction of hydrogen content by 90 percent and nitrogen and carbon contents by 50 percent. Analyses of 500 and 1000-pound lots showed the sum of carbon, oxygen, hydrogen and nitrogen to be about 0.1 percent.
A new stainless steel powder, according to the newsletter, can make stainless steel shapes of more than 95 percent theoretical density. Composition of powder is similar to Type 316 or CF.-MO alloys. Mechanical properties of the sintered shapes closely approach those of...
