Directing against the problem of boiler shutdown leading to corrosion of outer-wall for boiler tubes

several conservation measures have been put forward as follows: (1) after boiler shutdown

thoroughly cleaning ash deposits without delay; (2) adding corrosion preventing isolation layer at places being covered with refractory materials; (3) a small amount of hot air to be ventilated in environment of high moisture; (4) venti lation to be carried out periodically for eliminating corrosvie gas. Practice shows that the above-listed measures to be simple and practical

being effective in practice.