5 adjectives to describe corrosion

Q.Are not marine boilers subject to internal corrosion? A.Yes; the greatest part of the corrosion of a boiler takes place in the inside of the steam chest, and the origin of this corrosion is one of the obscurest subjects in the whole range of engineering.

Q.What is the cause of the rapid corrosion of marine boilers?

The secret corrosions of the ship-worm will sink a fleet.

The girl kept on, conscious that her irksome critic was taking keen note of a subtle, cruel decay of her beauty, a spiritual corrosion that, without other fault to the eye, had at last reached the surface in a faint hardening of lines and staleness of bloom.

She turned it over, displaying that thick green corrosion which bronze acquires only by great age.

5 adjectives to describe  corrosion