The phrase "corrosive acid" refers to a very strong and harmful liquid that can cause damage and destruction when it comes into contact with objects or living things. Full definition
The polymer - based RFB we present uses an environmentally benign sodium chloride solution and cheap, commercially available filter membranes instead of highly corrosive acid electrolytes and expensive membrane materials. (nature.com)
And maybe they wouldn't be, but for the fact that Plant Yates, a coal - fired plant that opened in 1950, spewed 3.4 million pounds of corrosive acids into the air in 2011. (scientificamerican.com)