ISO 17224 Test method for high temperature corrosion of metallic materials by deposits of salt, ash or Miscellaneous substances for corrosion of metals and alloys specifies a method for simulating high temperature corrosion environments by depositing salt, ash or Miscellaneous substances on metal surfaces. This test method is designed to evaluate the corrosion performance of metals and their alloys when exposed to high temperature, corrosive deposits. During the test, the long-term corrosion behavior of the material in the actual industrial environment is simulated by controlling the temperature and the type, amount and distribution of deposits. This method can be widely used in aviation, energy, metallurgy and other fields, especially in the evaluation of material durability under high temperature corrosion conditions, providing scientific basis for material selection, design and improvement.