Wear-resistant ceramic adhesive defects

In recent years for wear-resistant ceramic paste industry with adhesive defects:

1. Insufficient temperature resistance: most of the equipment is running at a certain temperature, the traditional epoxy adhesive temperature resistance is only about 120 ℃, can not be very good to meet the operating conditions of the equipment, resulting in wear-resistant ceramic piece of the fall;

2. Insufficient toughness: the thermal expansion rate of wear-resistant ceramics and equipment substrate metal expansion rate is different, and the temperature change in equipment operation is frequent, which requires the adhesive layer can compensate for the displacement caused by the different expansion rate between the two. Thermal expansion rate of wear-resistant ceramics and equipment substrate metal expansion rate is different, and the temperature change in the operation of the equipment is frequent, which requires the adhesive layer can compensate for the displacement between the two due to the expansion rate of the different internal stresses, the traditional epoxy adhesive brittleness is large, can not well meet the equipment in the temperature change of the toughness of the adhesive requirements, resulting in the wear-resistant ceramic piece of the shedding;

3. Insufficient: Generally speaking, wear-resistant ceramics can fully meet the equipment protection cycle wear protection requirements, the aging performance of the adhesive will determine the equipment protection cycle wear-resistant ceramic piece of the key factor of whether or not to fall off, the traditional adhesive in the equipment operation of the changing and harsh conditions of aging often can not be very good to meet the requirements;

4. Insufficient corrosion resistance: some equipment is in certain corrosive conditions Operation, if the single consideration of the bonding effect and ignored the requirements of the corrosion resistance of the adhesive, but also tend to make the wear-resistant ceramic piece off and cause protection failure;

5. construction process is not enough:

5.1 wear-resistant ceramic piece of paste is a detailed and time-consuming work, each time to adjust the good adhesive to be used up in a certain period of time, if the adhesive curing early will often be the adhesive is also Not used up has been cured, thus causing a waste of glue; if the good adhesive curing slow, will affect the construction progress;

5.2 The shape of the equipment varies greatly, need to wear-resistant protection of the parts of the situation is not the same, when in the equipment fa?ade and the interior of the roof of the wear-resistant ceramic piece of adhesive construction, the traditional adhesive in the curing of the former will be downward flow, and therefore will require a large number of auxiliary support measures or a large number of magnets to prevent the ceramic piece of adhesive construction. A large number of magnets to prevent the ceramic tile in the adhesive is not yet cured before the downward falling off the situation, thus affecting the construction progress (most of the equipment is in the state of downtime for emergency repairs, the construction progress will determine the time to start), increase the construction cost.

Quality standards through the construction of wear-resistant ceramic paste industry over the years the feedback of the technical staff of the first line of opinion, to meet the wear-resistant ceramic paste industry with the glue should meet the following conditions:

1. After the professional modification of heat-resistant toughened resin to do the main agent;

2. The curing agent adopts the principle of multi-dimensional composite, so that the glue in the process of construction and application of the temperature change according to the working conditions to achieve Step-by-step curing;

3. Products in the aging resistance, temperature resistance, toughness, and corrosion resistance should have excellent performance to meet the needs of the actual wear-resistant ceramics paste conditions;

4. Construction process performance should be optimized and improved, and the best products can be used without the use of magnets and other auxiliary support measures under the conditions of the equipment facade and roof for wear-resistant ceramic paste construction.