Method for providing ceramic lining to a hollow body by thermit reaction

A method for providing a ceramic lining of layer on the inner surface of a hollow metal body which comprises the steps of

• (a) placing a powdery thermit mixture comprising a strongly reductive element and a reducible metal oxide in the hollow space of the hollow body,
• (b) rotating the hollow body around an axis so that the powdery thermit mixture is pressed against the inner surface of the hollow body by centrifugal force to form a layer,
• (c) igniting the thermit mixture at least at one point of the layer thereof formed on the inner surface of the hollow body while still under the centrifugal force so that the thermit reaction of the thermit mixture takes place and the reducible metal oxide is reduced to a molten metal and the strongly reductive element is oxidized to an oxide which forms an innermost layer of ceramic material with the molten metal forming an intermediate layer between the inner surface of the hollow body and the innermost layer,
• (d) degassing the space within the hollow body by means of a vacuum to remove thermit reaction gasses and to remove gasses from the layers, and
• (e) then cooling the hollow body to solidify said intermediate and innermost layers and provide on the inner surface of the hollow body, stratified layers of the metal and the ceramic material.