Thermography


THE ADVANTAGES OF THERMOGRAPHY

Thermography allows visualization of the heat distribution of every solid thanks to the use of an ifrared thermocamera; therefore it enables to carry out what follows:

  • non-destructive inspections (since it does not alter the analysed solid);

  • non-invasive inspections (since there is no contact with the analysed solid);

  • inspections during normal usage (without turning off the examined parts);

  • extremely safe inspections (because they are carried out from a safe distance);

The thermographic image enables to identify anomalies in the heat distribution, and so it reveals the existent problems, in order to allow to take precise and effective countermeasures.


Further advantages are:

  • reduction of the requested time to carry out an analysis;

  • precision in identifying the parts with anomalies;

  • possibility to foresee an anomaly;

  • data storage for future comparisons.

By using particular inspection techniques called active thermography, it is possible to cause artificially an event, in order to register and analyse it, so that it will be easier to test its proper functioning.


Thermography, when used cleverly and by a very competent technical staff, proves to be in its applications not only the only method to visualize and analyse several different thermal situations, but also the most inexpensive method to define the most suitable way to intervene.


APPLICATIONS TO THE NAUTICAL FIELD

It is essential for every owner of a boat to know the level of efficiency of his means, and to be able to notice and appraise in advance those problems that could compromise the safety of the boat, or that could compel him to very high expenses to restore hitches for which the effect is known, but not the cause.

The easy identification of many of these problems is surely wished by everyone. During a trading negotiation, it is important to know whether the hull is in perfect condition or if it underwent huge treatments.


Thermography applied to wooden or fibreglass hulls allows the identification and the mapping of:

  • Osmosis

  • Delamination

  • Repairs

  • Water seepage inside the boats

  • Leaks in the tubing (water; gas; air conditioner)

  • Presence of damp on wooden hulls

  • Thermal analysis on engines, turbines, heat exchangers

  • Check of the electrical connections


OSMOSIS

In a hull with osmosis - which can be noticed from the typical bubbles on the fibreglass surface- thermography underlines the temperature difference caused by the fluid or the damp in which the fibreglass is soaked, against the intact parts. By supporting the thermographic image with the measurements made with the hygrometer, it is possible to outline a map where the distribution and the seriousness of the osmosis effect on the fibreglass are highlighted. In this way it will be possible to intervene with a much more targeted recovery intervention.


During the treating of osmosis, after the peeling of the part which has to be restored, it is possible to check and substantiate with a thermographic image the distribution of damp in the fibreglass, in order to endorse efficacy in the correctness of the recovery intervention on the treated surface.


Active thermography is used to visualize the temperature difference, which allows for a precise analysis. Thermography actually exploits the range of temperature of the analysed surface to register the differences in the release of heat of the structure.


DELAMINATION

When in a composite material there is a split causing the parting of its components, a delamination is generated, with the subsequent detachment of the laminas. Delamination could be caused by several factors, but what it is important to notice is that it could initiate a chain process due to the stress to which boats are usually liable. Thermography enables to visualize such defects through the use of specific technologies that slightly influence the temperature of the analysed surface, allowing the identification of those flaws.


REPAIRS

All the materials used for repairs, such as putty, epoxidic resin, etc. have thermal features different from the original structure, which is why they can be recognized through thermography, even though they cannot be seen by the human eye because of the fact that they are concealed by paint.



WATER LEAKS IN THE BOATS

A water leak in a boat can induce the formation of moulds and therefore compromises the inner appearance of the boat. The presence of water causes a fall in temperature in those areas it comes in touch with; this enables us to identify the cause of this problem thanks to the usage of thermography.

WOODEN BOATS

In the wooden boats a bad maintenance of the superficial treatments could allows the absorption of damp which, in time, could compromise the intactness of the boat. Wet or damp wood has a surface temperature which is different from that of dry wood, therefore it can be identified with a thermographic inspection.


THERMAL ANALYSIS ON ENGINES, TURBINES AND HEAT EXCHANGERS

In a two-engine boat it is possible to analyse with thermography, on a direct confrontation, the correct working of the engines and of all the connected mechanical parts. Any anomaly will be signalled by a different heat distribution, so that it will be possible to identify it.










CHECKING ELECTRICAL CONNECTIONS

Thermography allows to identify overtemperatures caused by anomalies and contact resistance on: electrical panels, power switches, isolators, fuses, power joints, terminal boxes, electrical engines, etc.