Elcometer 106 User manual

English

Elcometer 106

Adhesion Tester

Operating Instructions

106_TMA_0003_00_06.fm Page -1 Wednesday, January 21, 2009 3:21 PM

English

is a registered trademark of Elcometer Limited.

All other trademarks acknowledged.

retrieval system or otherwise) or translated into any language, in any form or by any means (electronic,

mechanical, magnetic, optical, manual or otherwise) without the prior written permission of

Elcometer Limited.

A copy of this Instruction Manual is available for download on our Website via www.elcometer.com/

downloads

Doc.No. TMA-0003 Issue 06

Text with Cover No: 4250

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CONTENTS

Section Page

1 About your tester . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

2 Using your tester . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

3 Adhesives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

4 Dollies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

5 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

6 Technical specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

7 Spare parts and accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

8 Related equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

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hank you for your purchase of this Elcometer 106 Pull Off Adhesion Tester. Welcome to Elcometer.

Elcometer are world leaders in the design, manufacture and supply of inspection equipment for coatings

and concrete. Our products cover all aspects of coating inspection, from development through application

to post application inspection.

The Elcometer 106 Pull Off Adhesion Tester is a world beating product. With the purchase of this product

you now have access to the worldwide service and support network of Elcometer. For more information visit

our website at www.elcometer.com

1 ABOUT YOUR TESTER

The Elcometer 106 Pull Off Adhesion Tester is designed to measure the bond strength of applied coatings.

A wide range of coatings can be tested including paint, plastic, sprayed metal, epoxy, wood veneers,

laminates on wood, metal or plastic.

The Adhesion Tester employs a pull-off method to measure the force required to pull an area of coating

away from the base material.

The surface under examination is prepared and then a test dolly is attached by adhesive. When the

adhesive is cured the Adhesion Tester claw is engaged onto the dolly and a force is applied by tightening

a wheel/nut on the top of the tester. The force is recorded by means of a dragging indicator on an engraved

scale. The indicator retains the value at which the dolly and the coating separate from the surface.

There are five different ranges available. Each range is expressed in imperial and metric units and is directly

related to the area of the standard dolly.

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1.1 STANDARDS

Your Elcometer 106 Pull Off Adhesion Tester can be used in accordance with the following National and

International Standards ASTM D 4541, AS/NZS 1580.408.5, EN 13144, ISO 4624 supersedes EN 24624 &

NF T30-062, ISO 16276-1, & NF T30-606.

1.2 THESE INSTRUCTIONS

These instructions describe the operation of the following models of the Elcometer 106:

Elcometer 106/1 Scale 1(0) to 3.5 N/mm² (500 psi)

Elcometer 106/2 Scale 2(0) to 7 N/mm² (1000 psi)

Elcometer 106/3 Scale 3(0) to 15 N/mm² (2000 psi)

Elcometer 106/4 Scale 4(0) to 22 N/mm² (3200 psi)

Elcometer 106/5 Scale 5(0) to 0.2 N/mm² (30 psi)

1.3 WHAT THE BOX CONTAINS

• Elcometer 106 Pull Off Adhesion Tester

(Scale 1, 2, 3, 4 or 5)

• 20 Dollies

• Pack of Araldite Adhesive

• Base Support Ring

• Magnetic Dolly Clamp

• Dolly Cutter

• Ratchet Spanner (Scale 3 and 4 only)

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• Polypropylene Carrying Case

• Operating Instructions

2 USING YOUR TESTER

2.1 SECURING THE DOLLY - HORIZONTAL SURFACES

The surface of the dolly and the test area should be abraded and be free from oil, moisture and dust to

ensure a good bond between the dolly face and the coating.

1. Prepare the surface of the dolly and the coating where the dolly is to be applied by roughening with an

abrasive paper. Then de-grease these areas by using a suitable solvent to clean both surfaces.

2. Mix a small quantity of adhesive and apply an even film to the prepared surface of the dolly.

3. Place the dolly onto the prepared test surface and apply pressure to squeeze out excess adhesive

which should then be removed. Allow the adhesive to cure for the recommended time - see

“Adhesives” on page 6.

Dollies can be re-used after cleaning. Additional dollies are available from Elcometer or your local supplier

- see “Spare parts and accessories” on page 11.

2.2 SECURING THE DOLLY - VERTICAL SURFACES

A magnetic dolly clamp is included with your Elcometer 106 kit of parts.

Follow the instructions given in section 2.1 above, but use the magnetic dolly clamp to hold the dolly in place

while the adhesive cures. Ensure the ‘keeper’ disc is removed from the magnet prior to use.

The magnetic dolly clamp will only work on ferrous substrates.

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2.3 APPLYING LOAD TO THE DOLLY

1. Cut around the base of the dolly very carefully using the dolly

cutter. This is only necessary when lateral bonding in the

coating is greater than adhesion, for example, elastomeric

coatings.Place the base support ring over the dolly ensuring

that it lies flat on the surface.

2. Slacken the handwheel or nut on the Adhesion Tester. Set the

dragging indicator to zero (0) on the scale and engage the

claw carefully with the dolly.

3. Hold the Adhesion Tester steady with one hand to prevent

rotation and tighten the handwheel or nut slowly and evenly to

apply an increasing force to the dolly and hence to the coating.

Continue until the coating fails and the dolly is removed from

the surface, or until the specified test force is indicated. The

pull-off force is read from the position of the dragging indicator

after the test is complete.

Note: The force should be applied evenly over a time period

not exceeding 90 seconds. Avoid jerking the tester as this will

add unwanted forces to the test area.

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WARNING: There will be a loud bang and the Adhesion Tester may jump up a few centimetres

as the dolly and coating detach and the energy in the tester is released. For personal safety it

is recommended that the operator does not lean over the Adhesion Tester during use.

4. Immediately after the test is complete and the pull-off force has been recorded, slacken the handwheel

or nut to remove all the force from the unit.

2.4 ASSESSING THE RESULTS

To record the result, first inspect the face of the dolly. In most cases the coating will fully adhere to the dolly

and the test can be claimed as 100% valid. In some cases, the coating will cover only part of the area of the

dolly and a partial adhesion failure should be recorded.

If no coating is present on the dolly this must be recorded as a failure of the adhesive (or glue). This is

normally due to incorrect or insufficient mixing of the component parts of the adhesive, or incompatibility of

the adhesive and the coating.

Observing the test area will give additional information about the type of failure; adhesion and cohesion

between different layers of the coating.

3 ADHESIVES

The adhesive supplied with the instrument is Regular Araldite which is a two component epoxy paste. When

mixed, it is to be used within 1 hour. The two components should be mixed in roughly equal portions.

Curing Times:

• 24 hours at 25°C

• 3 hours at 60°C

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Suitable for warm and hot environments. Lower temperatures require extended curing times of up to 3 days

or more.

Rapid Araldite is a fast setting two pack epoxy paste. It should be mixed for 30 seconds and used within 2

minutes.

Curing Times:

• 8 hours at 25°C

• 4 hours at 10°C

• 2 hours at 23°C

• 1.5 hours at 40°C

Suitable for cold and warm environments.

Other adhesives include acrylic types with much faster setting times. Loctite Multibond is well suited for

low temperature and fully cures in 24 hours. Scotch-weld M2000 will reach a high strength after 30 minutes.

The suitability of any adhesive should be determined by the User. Some coatings can be adversely affected

by adhesives. Some adhesives can be contaminated by coating environments, solvents etc.

The adhesive supplied with this product must be disposed of as special waste unless it has been fully cured.

To dispose of excess adhesive at the end of its shelf life simply mix the remaining material and allow it to

cure before disposal.

For further guidance on the disposal of adhesives contact your local environmental authority.

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4 DOLLIES

Dollies can be re-used after cleaning.

Large dollies

Coatings on concrete, cementatious layers and uneven surfaces can be tested more effectively with a large

dolly. This has twice the diameter and so 4 times the area of the standard dolly. The scale readings of the

Elcometer 106 must be divided by 4 to compensate.

The large dolly is taller than the standard dolly. A special base ring is used to support the instrument to

enable correct operation. The large dollies and base ring are available from Elcometer or your local supplier

- see “Spare parts and accessories” on page 11.

5 MAINTENANCE

The Elcometer 106 Pull Off Adhesion Tester is designed to give many years service under normal operating

and storage conditions.

Lubricate the screw threads with light machine oil on a regular basis.

Pull-off force

The pull-off force is provided by the progressive compression of Belleville washers.

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