“Others are blending barium sulfate or tungsten compounds into their material mix to add radiopacity to the extruded products, Shah says.”

“These steels are usually welded by the gas tungsten arc or the gas metal arc welding process.”

“X rays emerge when the electrons, accelerated by a strong electric field, slam into a tungsten target.”

“The coating includes from 2 to 4 parts of an oxide and one part of a chromate, molybdate, oxalate, phosphate, or tungstate.”

“Treatment with tungstate did not affect nitrate uptake in all the conditions tested.”

“Anions including tungstate or sulfate cannot effectively replace molybdenum binding.”