Adhesion

Bitumen And Mastic Insulation Adhesion Tester NOVOTEST CM-4219

Application of the device
Adhesion tester CM-4219 is a device for measuring the adhesion value of bitumen pipe insulation and other insulating coatings which are based on bitumen. Adhesion tester CM-4219 is a mechanical device which allows to determine the adhesion value of quality and quantity, by measuring the strength of sticking the bitumen insulation to the surface of the pipeline.


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.

Design of the device
Structurally device complies to the standards and consists of the system of rods, which are connected by a calibrated spring. The device is 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, converts into the shearing force and determines the adhesion value of the bituminous coating.

Measurements
The adhesion value of the insulating coatings is characterized by shearing force for a part of isolation of 1 cm2. Testing with adhesion tester CM-4219 is performed in the following way: on the area 10 * 10 mm. of the covering insulation performed 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 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 are 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.

Peel Adhesion Tester NOVOTEST AP-4219

Adhesion tester AP-4219 is designed to measure the adhesive strength value of the coatings on different structures, as well as to determine the adhesion value of polymeric insulating tapes which are generally used for pipes insulation. Adhesion tester AP-4219 is reliable and easy in operation.

 

Design of the instrument

Adhesion tester AP-4219 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, that significantly improves it’s usability, compared to existing analogues: user’s hand never overrides the scale of the instrument. Adhesion tester has reliable construction of stainless steel, that guarantees it’s long life. The design of instrument allows user to operate at low temperatures or conditions of high humidity and dust.

Pull-off type adhesion tester is designed for measuring of adhesion value of paints and other coatings on base and between layers or cohesive materials.

 

Tensile Adhesion Tester NOVOTEST AC-4624 is manufactured in compliance with EN13144 and ISO4624, ISO16276-1.


The testing with mechanical tensile adhesion tester AC-4624 is performed in the following way. On the testing cover is glued dolly and after that, it is pulled-off with the spring-system of the device. The force which is applied for pulling-off the glued dolly, is displayed in numerical value by the indicator on scale of the device. This value – is the value of adhesion.

Cross Cut Adhesion Tester is designed to comply with: ISO 16276-2, ISO 2409, DIN 53151, ASTM B 335, ASTM D 3002, BS 3900-E6, BS EN ISO 2409, NF T 30-038.


Cross Cut Adhesion Tester NOVOTEST AN-2409 is designed for cuts (parallel or lattice) adhesion testing method , and for thickness range of paint coatings up to 200 µs, according to ISO 2409, ISO 16276-2, ASTM B 3359.

Device can be used on both flat and curved surfaces.
The method of parallel or lattice cuts is consist 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 is to be cleaned and visually analysed the value of adhesion by the nature and the area of destruction of the coating.


Structurally Cross Cut Adhesion Tester NOVOTEST AN-2409 is consist of plastic handle and metal head for fastening multi blade knife, which is made of tool steel. Each knife has six main and two restrictive blades. User can sharpen blunted blades.

Cross Hatch Adhesion Plate NOVOTEST AH-16276

The instrument is designed to measure the adhesion value of coatings in compliance with ISO 16276-2 and ASTM D 3359.

 

Adhesion tester consist of a flat steel plate with normalized slits, which is used as a template to perform incisions with the knife.

 

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, after that, the adhesion value is visually evaluated according to the point system

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