Microscope
photographs
The
following pictures show microscopic photographs of the fully
cured PolymerMetal MM-metal oL-steelceramic magnified by a factor
of 100 and 500. Here the bonding between MM-metal oL-steelceramic
and metallic surfaces (steel or casting), which have been contaminated
by various applied oils before, has been analyzed. MM-metal oL-steelceramic
penetrates and absorbs oil, grease and fuel. The direct-MM-bonding
technology secures the direct and high solid bonding on contaminated
surfaces.
Bonding
on oily surfaces
Tests have been carried out to evaluate the quality
of the bonding on different surfaces. At the reference test MM-metal
oL-steelceramic and Hardener yellow have been applied to a cleaned
(that means oil free) and roughened metal surface. The reference
value of 100% stands for the quality of the various determined
technical data during bending, shearing & hydraulic tests
after total curing time. Other values have been determined by
applying MM-metal oL-steelceramic on different contaminated metal
surfaces. The test results demonstrate that sometimes better
technical values were reached after application on oily metal
surfaces than on clean metal surfaces.
 |
Testing
of pressure tightness
To be able to evaluate the quality of the application
of MM-metal oL-steelceramic on oily surfaces, tests have been
carried out at company M.A.N. under supervision of the classification
society Lloyds Register of Shipping. Here special test pipes
made off steel have been created according to the following drawing.
Around a leakage of a size of diameter 5 mm the metallic shiny
surface (Rz 65 µm) of the test cylinder was contaminated
with oil. Then the cold-curing MM-metal oL-steelceramic with
Hardener yellow was applied around the leakage. After full curing
of the PolymerMetal the test cylinder has been filled with a
liquid and pressure was built up. Then the system was checked
against pressure tightness.
Pressure
|
Test
cylinder temperature
|
Tool
|
Result
|
100
bar
|
20 °C
|
-
|
pressure
tight
|
150
bar
|
20 °C
|
-
|
pressure
tight
|
200
bar
|
20 °C
|
-
|
after
8 hours small leakage
|
In
the course of the time the research and development division
of MultiMetall was successful to continue optimising the material
MM-metal oL-steelceramic and new tests with same conditions
have been carried out at MultiMetall. The following results
were achieved:
Pressure
|
Test
cylinder temperature
|
Tool
|
Result
|
200
bar
|
20 °C
|
-
|
pressure
tight
|
300
bar
|
20 °C
|
-
|
pressure
tight
|
350
bar
|
20 °C
|
-
|
after
2 hours small leakage
|
150
bar
|
75 °C
|
-
|
pressure
tight
|
400
bar
|
75 °C
|
-
|
pressure
tight
|
The
pipe clip was fixed around the test cylinder in the area of
the leakage. Reinforcing elements as i.e. fibres or mats consisting
of glass or carbon have not been used. These would have increased
the physical strength essentially.
The
tests have been carried out at M.A.N. (test report No. 1731/82)
under supervision of Lloyds Register of Shipping (certificate
No. 301954) in 1982, the test at MultiMetall in 1995.
Extract
of the certificate: „The test results of MM-metal oL-steelceramic
may be classed as ranging from good to exceptionally good.
All test results were in support of the maker’s claim
that MM-metal oL-steelceramic will bond on oily surfaces with
a high degree of reliability.”
Practical example
At a service company, which is operating in the oil & gas
industry worldwide, pressure tests have been carried out with
MM-metal oL-steelceramic. The test piece was pressure tight up
to a tested pressure load of 4.000 psi (~ 275 bar).
Here are some
photographs incl. test records:
Above
mentioned information can be found in Technical
report No. 006 
,
too.
Detailed
information can be received from our technical data sheets,
which are available for every product and which can be requested
by using the contact form.
=> Product
description MM-metal oL-steelceramic
Possible
product applications can be found at Worldwide
repairs.
MultiMetall® • PolymerMetall® • Ceramium® • Molymetall® • Sealium® • XETEX® • the
MetalExistenceCompany® 
