The greatest harm that friable asbestos can inflict is , if it becomes airborne and is inhaled, it may produce mesothelioma or lung cancer. Either of these diseases can be fatal.
Yes, any non-friable form of asbestos can become friable.
Some kinds can become friable simply through aging, weathering, or normal use. Others become friable if worked with power tools, producing...
Corrugated asbestos typically contains White (Chrysotile) asbestos at between 10 to 15 % content, however some older materials can contain Blue and Brown at varying content.