CThe evidence of the salt spray fog tests has demonstrated that the OZAK M
Series bearings have a much more favorable corrosion resistance than those using
stainless steel (grades SUS440C. and QD51). The test results have already
demonstrated the effective of the rust protection that is the hallmark of this
series. Yet the acid resistance of these bearings is often called into question
when inquiries are made. We have conducted acid corrosion tests to determine the
behaviors of this series under acid exposure conditions.
Resistance to
Hydrochloric Acid Resistance to hydrochloric acid systems is
determined on the basis of the hydrogen chloride spray test results. These tests
have shown that the OZAK M Series has a much higher corrosion resistance to
hydrogen chloride than the stainless steel bearings. For comparative assessment,
the hydrogen chloride spraying test results for the OZAK M Series and for
stainless steel bearings are compared in the table below.
Resistance to Nitric
Acid Test Method:
@Nitric Acid Fuming Test to JIS H8616 4,5,3
Test
Conditions: @Introduce 150cc of first-grade reagent-type nitric acid into
the bottom of a 20cm glass desiccator and close desiccator lid. Leave for 30
minutes to let the nitric acid gas (fumes) fill the interior of the desiccator.
Then place the degreased(ethanol-cleaned) specimen surface.
The results reported
below. Click
here to Zoom or Save the file image. |