Zeros GmbH

The Zeros testing laboratory uses dye penetrant testing to identify defects on surfaces of metallic and other non-porous materials. Dye penetrant testing is a non-destructive material test.

Due to the capillary effect, a coloured test liquid penetrates every irregularity of the test object, depending on the type and properties of the material. After removing the test liquid, a counter-capillarity is created by applying a developer layer, which makes cavities, cracks and other defects visible.

The prerequisite for veritable results of this penetration process, which is used in particular in steel, bridge and container construction, is a particularly careful and thorough procedure by DIN 54 152 of the Materials Testing Ordinance.

Magnetic particle testing is used to detect defects, near and on surfaces, in ferromagnetic materials such as cast iron, steel, cobalt and nickel.

The effect is used that defects in the material produce small stray fields on the surface when exposed to magnetic fields. The ferromagnetic particles collect in these stray fields.

Zeros GmbH carry out crack tests in the laboratory or on-site.

Crack testing, or surface crack testing, is a collective term for the surface methods of dye penetrant testing (PT) and magnetic particle testing (MT).

When checking for cracks, a defect must be open to the surface so that it can be visible. The test material penetrates the crack ( dye penetrant testing ) or collects on its surface due to a change in the magnetic field ( magnetic particle testing ). This procedure can detect cracks, pores and bonding defects down to 1 µm. Of course, when testing for cracks, the test equipment must be material-compatible.

Execution in an accredited test laboratory or mobile on-site

Materials such as steel, cast iron and plastic are x-rayed and checked for general quality and homogeneity. That is why this test procedure is also called radiographic testing. Radiographic testing is particularly suitable for identifying volume defects and is a focus of Zeros GmbH in non-destructive material testing.

RT technology they offer:

• stationary x-ray
• mobile x-ray
• X-ray systems up to 300kV
• Isotope Iridium 192
• Isotope selenium 75
• Laboratory vehicle
• Local development

With a flexible laboratory trolley, the specially trained team at Zeros GmbH can also carry out the X-ray test mobile and directly on-site at the object. Depending on the material, we select the appropriate one from the wide range of possible radiation methods and, as a result, provide reliable information about the test object.

Carried out by an accredited testing laboratory

Visual inspection is an important part of the non-destructive testing procedures and is carried out at Zeros GmbH exclusively by experienced, certified employees. Defects in materials, inaccuracies in dimensions and workmanship or defects in the quality and condition of surfaces are detected quickly and directly and, after the visual inspection, are then subjected to further test procedures if necessary.

Visual inspection, visual inspection, VT inspection, VT2 inspection and visual inspection are synonyms for the same inspection procedure. The abbreviation VT stands for the English term “visual testing”. This test procedure can be carried out directly or indirectly.

Highly complex, uniquely flexible and one of the most reliable testing tools around - the human eye is excellent when it comes to assessing quality.

At Zeros GmbH they carry out this test stationary or mobile. 

They offer manual and digital ultrasonic testing. They would be happy to check directly on-site for individual or series orders. Zeros GmbH can also offer you phased array and TOFD process technology.