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

Patent · Mon Jan 01 00:00:00 EST 1996

OSTI ID:870618

Lane, Michael H ^[1]; Salamon, Eugene J. M. ^[1]

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1. Clifton Park, NY

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.

• Research Organization: Knolls Atomic Power Laboratory (KAPL), Niskayuna, NY (United States)
• DOE Contract Number: AC12-76SN00052
• Assignee: United States of America as represented by United States (Washington, DC)
• Patent Number(s): US 5560883
• OSTI ID: 870618
• Country of Publication: United States
• Language: English

Related Subjects

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
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