Is your sealer working?
As a manufacturer of sealers and impregnating agents, we have been looking to answer this question for several years. Conventional examination methods such as scanning electron microscopy (SEM) or comparable microscopic methods can take a lot of time and be cost prohibitive. They also usually do not offer a quantified statement, but only show a snapshot. The electrochemical corrosion test also does not provide any reliable information on the long-term function of the sealer in the TS layer.
Working with the Institute for Surface Technology (IOT) at the RWTH Aachen University, we have developed a fast and cost-effective detection method for the penetration behaviour of sealers in thermally sprayed layers. We use this process to ensure our sealers really work in conjunction with your TS layer and the respective process parameters.
Does your sealer penetrate deep enough?
If you want to get long-term protection of your thermally sprayed coating, it is necessary for the sealer to penetrate deep into the TS layer. Sealers that only adhere to the surface or have minimal penetration will wear away along with the TS layer during finishing or even after just a few hours of operation. The remaining layer is unprotected and therefore susceptible to corrosion damage.
Let the effectiveness of your sealer be tested!
With the new diamond penetration test based on permeability measurements, you can get a 100% clear statement about the penetration depth of the sealer. This helps us to develop a sealer which perfectly matches your specific coating, penetrates the complete TS layer and guarantees maximum performance!
Only a layer that is completely sealed up to the carrier body is permanently protected against corrosion!
For the test, we use special carrier bodies made of sintered metal. These carriers will use your spraying parameters and thus represent a 100% suitable, practical laboratory sample of your TS layer. We measure the coated test specimens and apply the sealer in our laboratory. The samples are then ground down step and we determine the permeability of the carrier body. The penetration depth of the sealer correlates with the measured permeability and be clearly determined for each sample.