General FAQ

What is XADO-technology ?

XADO-technology is a technique of reconditioning of machines, assemblies and mechanisms, which were not mechanically injured in the standard mode of operation (without disassembly and interference with functioning). XADO compounds are fully analogous and synonymous to the trademark PBC-technology.

What is XADO reconditioning compound?

XADO reconditioning compound is a multicomponent fine mixture of natural minerals, additions and catalysts.

The main feature of the compound is that it is able to form with the surface layer of metal at friction and contact spots a cermet protective coating as a result of the reaction of substitution of metal ions in crystal lattice nodes. The substitution reaction results in formation of new crystals with a more spatial crystal lattice, which raise over the surface of the contact spot to make up for the wear. Besides:

• XADO is a compound, which can easily dissolve in oils, including synthetic ones, and other carriers. The amount of the compound required for treatment will not change the oil viscosity. Oils are viewed as the compound carriers and a heat exchange medium. The grade and quality of such oils are of no importance.
• XADO is not a abrasive-like material. Never and under no conditions XADO can become the major cause of the mechanism destruction, even in case of a multiple overdosage.
• XADO "operates" only where friction exists, i.e. where exists the energy, required for the substitution relation to proceed.

What properties does the protective cermet coating possess?

Basic properties of the cermet protective coating:

• Micro-hardness of surfaces 400-450 kg/mm²
• Friction coefficient: 0.003-0.007;
• Compressive stresses: 250 kg/mm²;
• Eliminates by 100% the "metal-to-metal" contact, replacing it with a "cermet-to-cermet" contact;
• Is not incompatible with the steels, where it forms, as between it and surface layers of the parts there is no distinct interface. Holds onto the steel surface better, than chromium, nickel and various facings;
• Completely corrects hydrogen cracking of rubbing surfaces of the parts;
• High corrosion resistance.
• Will not spall on deformation and shocks.
• Can be renewed as it deteriorates with time by a repeated XADO-treatment.

What causes wear and corrosion of machine parts?

The overwhelming majority of machine and mechanism parts are manufactured out of a small number(15-20 names) of iron alloys (steels and cast irons). The main factors, which make these wear and corrode, are:

• Electrochemical corrosion (chemical instability)

  Steels and cast irons can be called solid solutions of chemically instable elements. The electrochemical corrosion is the most destructive factor for friction and contact surfaces. In all mechanisms all parts are made of materials, including metals, with different chemical composition. In service the parts are rubbing with different relative displacements. As a result, in friction and contact zones due to inhomogeneity of the metal structure in the presence of an excellent electrolyte (oil) there emerge electromagnetic fields in micro-volumes, which create perfect conditions for electrochemical corrosion procedure.

• Hydrogen embrittlement (cracking)

  This factor is intrinsic to the nature of metals and methods of production thereof. The existing remedies are highly expensive.

• Inability to "dry" friction

  Practically all existing today constructions are provided with lubrication systems and sealing arrangements. Eventually not a single sealing design proves capable of containing lubrication within crankcases at "gland-shaft" contact due to electrochemical corrosion. All this leads to low wear resistance and inability of the existing to date constructions to "dry" friction (friction without oil), which makes steels and cast irons readily fuse over the surface due to micro-welding between the micro-relief projections.

• Loss of structural strength and surface annealing with relatively low heating.
• Great weight of parts, articles.

What does XADO-technology treatment mean?

The XADO-technology treatment includes a number of process operations, targeted at attainment on friction and contact surfaces of machine parts of a cermet protective coating of a thickness sufficient to compensate the wear by utilization of XADO reconditioning compound.

The positive results of such treatment are obtained, if on the rubbing surfaces of any mechanism there will be delivered and worked on a required quantity of said reconditioning compound over the required time.

What machines and mechanisms can be reconditioned through XADO-technology?

All types of machines and mechanisms can be treated using XADO-technology, provided 2 conditions are met:

• If at least one part is made of metal;
• If the parts and mechanisms have no past-repair wear and mechanical damage.

In terms of XADO-technology any mechanism of any design must be viewed simply asa set of parts:gear wheels, bearings, sliding friction surfaces. Loadings and rotational speeds of such mechanisms, steel and cast iron grades, oil used have no importance. The mechanism design is considered from the point of view of delivery of the reconditioning compound to this or that rubbing pair only.

How can XADO be delivered to the rubbing surface of machine's parts?

To deliver XADO to the rubbing surface of machine's parts use can be made of the oil, employed in this particular unit. This carrier ensures removal from the rubbing and contacting surface of oil (additives) deterioration and decomposition products in the process of the working-on and cleaning of XADO.

Practical applications have refined 4 main XADO delivery routes:

1. Using standard lube system. This applies to: crankcases of internal combustion engines, compressors, hydraulic system tanks, machine tools' lube reservoirs.
2. Partial disassembly and application of the compound to the rubbing pairs. This applies to: central cylinder set of internal combustion engines, compressors, reducers of tobacco machines, pump bearings.
3. Application directly to open assemblies and mechanisms. This applies to: chain transmissions, open gear wheel transmisions, machine tools' slides, rails, parts, which are worked on metalworking machine tools, for example, during working of rolling bearings and rolls.
4. Application via fuel from tank. This is, for example, XADO application to HPFP diesel engines.

How to work with XADO compound most comfortably?

XADO is on offer in the form of a gel-like suspension and greases.

• XADO Gels readily dissolve within 10-15 s in any petrochemical (both mineral and synthetic). Should you have any difficulties with XADO application in any particular case by squeezing it out of its tube due to a specific design of the mechanism, we recommend the following technique. Dissolve the required amount of XADO in any petrochemical in proportion 1:2. Use a syringe with a tubing length attached thereto to introduce the resulting mixture.
• XADO Greases. The volume and application procedure for XADO greases depends on the design of a particular assembly and is described in service instructions for those assemblies and mechanisms.

What is meant by "standard mode of operation" ?

By the "standard mode of operation" we mean following the operational conditions, specified in the instructions. For example, coolant temperature must not exceed 100^o С.

Who holds the copyrights over XADO-technology?

The copyright over XADO-technology are held by a group of individuals. "XADO" Corporation, which acts on their behalf, is authorized to grant international licenses for using XADO-technology and for exclusive distribution.