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AssigneeEbara Corporation
InventorsTetsuo Kuroda, Matsuho Miyasaka, Norio Takahashi
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An object of the present invention is to provide a method for forming an initial anticorrosive film in an absorption chiller-heater, by selecting optimal conditions of absorbent solution, steel material surface and film-forming operation for forming a good initial anticorrosive film. In the process for forming an initial anticorrosion film in an absorption chiller-heater having steel parts and containing an absorbent solution comprising lithium bromide as its main component and containing a lithium molybdate corrosion inhibitor according to the present invention, the main characteristics are that at least part of the steel parts of the absorption chiller-heater contacting with an absorbent solution at a temperature of higher than 100.degree. C. include a bare metal surface having an arithmetic mean surface roughness of not more than 1.0 .mu.m; the absorbent solution supplied comprises lithium bromide as its main component and contains a lithium molybdate corrosion inhibitor dissolved in the solution at a level of 450-750 ppm; and that an initial anticorrosion film forming operation is conducted at a condition such that amount of the lithium molybdate dissolved in the absorbent solution is maintained at not less than 200 ppm.
An absorption chiller-heater having steel parts and containing an absorbent solution comprising lithium bromide as its main component and containing a lithium molybdate corrosion inhibitor, wherein at least part of the steel parts contacting with the absorbent solution include a bare metal surface having an arithmetic mean surface roughness of not more than 1.0 .mu.m, which surface has then been coated with lithium molybdate whereby a lithium molybdate film having high anticorrosive power is formed on the surface.
A process for forming an initial anticorrosion film in an absorption chiller-heater having steel parts and containing an absorbent solution comprising lithium bromide as its main component and containing a lithium molybdate corrosion inhibitor, the process comprising assembling an absorption chiller-heater, wherein at least part of the steel parts of the absorption chiller-heater contacting with an absorbent solution at a temperature of higher than 100.degree. C. include a bare metal surface having an arithmetic mean surface roughness of not more than 1.0 .mu.m;
Dependencies are inferred from the claim text.