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Title: Method for forming a layer of synthetic corrosion products on tubing surfaces

A method is provided for forming a synthetic corrosion product layer on tube surfaces. The method utilizes two dissimilar materials with different coefficients of thermal expansion. An object tube and sacrificial tube are positioned one inside the other such that an annular region is created between the two tubes' surfaces. A slurry of synthetic corrosion products is injected into this annular region and the assembly is heat treated. This heat causes the tubes to expand, the inner tube with the higher coefficient of expansion expanding more than the outer tube, thereby creating internal pressures which consolidate the corrosion products and adhere the corrosion products to the tubing surfaces. The sacrificial tube may then be removed by conventional chemical etching or mechanical methods.
Inventors:
 [1];  [1]
  1. (Clifton Park, NY)
Issue Date:
OSTI Identifier:
870618
Assignee:
United States of America as represented by United States (Washington, DC) KAPL
Patent Number(s):
US 5560883
Contract Number:
AC12-76SN00052
Research Org:
Knolls Atomic Power Laboratory (KAPL), Niskayuna, NY
Country of Publication:
United States
Language:
English
Subject:
method; forming; layer; synthetic; corrosion; products; tubing; surfaces; provided; product; tube; utilizes; dissimilar; materials; coefficients; thermal; expansion; sacrificial; positioned; inside; annular; region; created; tubes; slurry; injected; assembly; heat; treated; causes; expand; inner; coefficient; expanding; outer; creating; internal; pressures; consolidate; adhere; removed; conventional; chemical; etching; mechanical; methods; dissimilar materials; similar material; method utilizes; chemical etching; inner tube; thermal expansion; heat treated; outer tube; annular region; synthetic corrosion; corrosion products; internal pressure; conventional chemical; internal pressures; similar materials; /264/216/

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