Tensile adhesion tester

Operation:
To determine coating adhesion, using the tensile adhesion tester, requires:
1. Glue the dolly to the coating with glue (epoxy, cyacrine or other, depending on the coating).
2. Using a special cutter, cut through the coating to limit the tested area from the main layer.
3. After the glue is frozen, attach the adhesion tester to the dolly tightly, and turn the main screw of the device until the dolly with the coating comes off the base.
4. Record the MPa value on the scale of the device in accordance with the dollies used.

Peel adhesion tester

Features:
Adhesion tester AP-1M consists of a body with removable clamp for holding the peelable strip of tested material with built-in dynamo-meter were breakout force is displayed. The design of the instrument allows user to set (control) the angle of peeling.
The dynamo-meter’s scale is applied to pull the rod, so that its usability significantly improves, compared to existing analogues: user’s hand never overrides the scale of the instrument. Adhesion tester has reliable construction of stainless steel, that guarantees its long life. The design of the instrument allows user to operate at low temperatures or conditions of high humidity and dust.

Bitumen and mastic insulation adhesion tester

Adhesion tester of bitumen insulation allows user to take measurements during testing; planned inspections of steel structures and pipelines after their installation, and also after performing the repairs in order to identify defects during the application of the insulation, as well as for the subsequent monitoring of the quality of performed works. The device has been successfully used in the field and in the laboratory (workshop) conditions.

Features:
Structurally device complies with the standards and consists of a system of rods, which are connected by a calibrated spring. The device has to be installed on pre-prepared section of the pipeline (or metal construction) with a cut-out portion of the polymer coating and, after turning the handle, the force is applied by the calibrated spring. During applying of the load, the device measures displacement of the rod. The value on the scale, which is installed on the device, is converted into the shearing force and determines the adhesion value of the bituminous coating.

Operation:
The adhesion value of the insulating coatings is characterized by shearing force for a part of isolation of 1 cm2. The test with adhesion tester SM-1M is performed in the following way: on an area of 10×10 mm of the covering insulation performe an incision throughout its entire thickness. After the device is installed on the cover and abuts the blade to the end face of the formed area of 10×10 mm. By turning the handle, the spring is compressed and applies the predetermined force to the knife, which transmits the shear deformation to the platform of cover. The strength of adhesion of the coating resists against the applied force. User should apply the force till occur the discontinuity (disruption) of coating area. The maximum value of testing is displayed on the scale of the device and fixed as the value of adhesion of the coating. The measurements have to be done at three different points, which are located at least 50 cm from each other. The value of adhesion is the arithmetic average of three measurements.

Scratch adhesion tester

Depending on the purpose of the testing and the applied load, the degree of penetration of the cutting unit into coating could be different, from the trace on surface to a total destruction of the coating. Device determines the resistance of the coating to scratching.
Modern requirements to the quality of coatings include control of the mechanical resistance of coatings to damage. The one important criterion of its assessment is the hardness of the coatings. For different requirements there are various methods of the hardness (strength) testing of coatings.

Cross cut adhesion tester

The method of parallel or lattice cuts consists of assessing the adhesion value while cutting through the coating down to the substrate by a multi-blade knife with the distance between the blades 1 mm, 2 mm or 3 mm which produces a strip or grating with the same pitch. Than the place of cutting has to be cleaned and the value of adhesion visually analysed by the nature and the area of destruction of the coating.
Structurally the cross cut adhesion tester AN-1 consists of a plastic handle and a metal head for fastening multiblade knife, which is made of tool steel. Each knife has six main and two restrictive blades. It is possible to sharpen blunted blades.

Cross hatch adhesion plate

Application:
The adhesion plate is placed on the test surface, the coating is cut with the knife up to the substrate, after which the plate is rotated and performed the second cut 30 degrees to the first in the form of an X (X-cut). Incisions are cleaned with a brush or with adhesive tape, and after that, the adhesion value is visually evaluated according to the point system.