Expert services

Assessment and solution of surface protection problems.

As a result we offer a comprehensive proposal to remove surface and base material mismatches.

Testing of metals

Performing of corrosion tests.

In case of a negative result, we are able to analyze the causes and propose specific measures.

Testing of plastics

Tests of painted plastics.

We perform tests mainly according to VW standards TL 211 and TL 226.


13. 4. 2024


We have purchased a new Liebisch corrosion chamber that can fit samples of size up to (2800 x 1000 x 1200) mm.

About Us

Testing Laboratory GRADUS, a.s. was founded 1.3.2009. Our mission is to provide corrosion tests, adhesion tests and surface condition assessment according to the above standards.

Among our advantages belong:

  • performing corrosion tests by professional staff having at least 10 years of experience
  • sharing information with the customers about the progress of the test, in case of negative test development we do not wait to the end of the test (cost savings of the customer)
  • in case of a negative result, we are able to analyze the causes (analysis of the base material, analysis of the actual surface treatment, etc.) and propose specific measures.

more about the laboratory


Testing Laboratory GRADUS is accredited by the Czech Accreditation Institute under number L-1603.

The laboratory is accredited to conduct corrosion and adhesion tests by the Czech Accreditation Institute, o.p.s. (CAI), signatory to the EA MLA. Laboratory was accredited for the first time in 2011 and defends her every year.

Laboratory has expanded its accreditation to dozens various test metods. Based on accreditation, the laboratory is capable of updating standards identifying test procedures and providing expert opinions and interpreting test results.

more about acreditation

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