The corroded plate of head of block of cylinders (HBC) is show on the photo . The repaired area is treated with a special instrument in order to remove mellow acicular metal and slag from it (see photo ). The repaired area is treated by DYMET^® device in 'abrasive treatment' mode in order to improve adhering of deposited metal to the plate (see photo ). Then aluminium is deposited on the damaged area (see photo ). An example of filling big corroded hole with the appropriate metal choke is shown on the photo . The choke is fixed in the hole and then metal is deposited on the damaged area till it reaches the HBC plate surface level (see photo ). The excessive metal is first removed by rough mechanic treatment (see photo ). Then fine local polishing or whole plate surface grinding is necessary to consolidate HBC with block of cylinders.

The process peculiarities:

• there is no need to remove technical contaminations (in particular, oils) from the surface before treating it;
• the metal deposition process is held under room temperature, there is no need to heat and then to cool HBC (as it is necessary to do in argon welding).

Post-sale anticorrosive treatment of welding seams of exhaust tract components

Every amateur and (of course) every professional driver or auto service worker is familiar with exhaust tract components corrosion problem. The problem is that those car components are actually most exposed to corrosion. More than other car units, those components are influenced by all factors making for corrosive destruction: varying high and low temperatures, humidity, road salt, dust and sand. As a result, muffler, resonator or other exhaust tract components are necessary to be replaced every couple of years.

Producers endeavour to extend lifetime of exhaust tract components. Esteemed companies make them from stainless steel, other producers use aluminium treated black steel for them, but the cheapest (and hence the less long-lived) components are made of traditional black steel and by chance are coated with 'silver paint'. Without discussing the advantages or limitations of different companies products let us illustrate an example of using DYMET^® equipment for 'post-sale' treatment of Bosal muffler for Opel Vectra