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Frequently Asked Questions

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CAN ROUGHNESS TESTING BE CONDUCTED ON WET SURFACES?

No, for reliable results the test surface needs to be dry.

DOES A SURFACE NEED TO BE PRE-TREATED PRIOR TO ROUGHNESS TESTING?

We recommend conducting Roughness Testing on surfaces in the condition they ultimately will be applied in the production process. If this involves a pre-treated surface, it is also best to test it in its pre-treated condition. This is obviously not the case when it is tested as a guarantee for its pre-coating roughness.

WHICH LIQUID PENETRANT TESTING METHODS DO YOU APPLY?

We use two different methods involving either a colour-contrasting liquid or one that glows up under UV-light. Mostly the penetrant washes off with just water, yet we sometimes also apply a chemical solution. Both options are offered for you to choose.

IS LIQUID PENETRANT TESTING POSSIBLE UNDER COLD CIRCUMSTANCE?

Yes, because we then switch over to another method, which is suitable to use in circumstances way beyond freezing point.

CAN LIQUID PENETRANT TESTING BE USED FOR FOOD PRODUCTION?

Yes it can, we apply another method and liquid, thus guaranteeing food safety requirements.

IS LIQUID PENETRANT TESTING POSSIBLE ON HOT SURFACES?

It is possible to a certain degree. Please let us know which temperature you are referring to, then we can determine which method is suitable.

CAN HARDNESS TESTING BE CONDUCTED IN THE RAIN AS WELL?

Yes it can, we have found a suitable solution for this.

CAN OXILYSER TESTING ALWAYS BE CONDUCTED?

Yes, as long as the materials are stainless steel.

Does Oxylyser Testing cause surface damage?

No, it leaves no traces.

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NDO Nederland

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