Other technologies

Chemical conversion treatments make it possible to obtain a layer of crystalline phosphates (Mn, FeMn, Zn, ZnFe, ZnCa).

Characteristics:
MANGANESE-TYPE PHOSPHATING:
• Reduced friction
• Improved adhesion of lubricating films
ZINC-TYPE PHOSPHATING:
• Greater corrosion resistance
• Excellent adhesion base for organic topcoats

Materials that can be treated: Ferrous alloys • Aluminum coatings • Zinc alloys • Cadmium coating.

Application examples: • Spur gears • Gleason couplings • Transmission pinions • Camshafts • Rocker arm shafts • Bolts of automatic firearms • Gun parts • Fishplate pins • Faucet barrels • All overmolding applications • Automotive fasteners

Organic coatings that bring solid lubricants such as molybdenum disulfide or graphite to the surfaces of treated parts.

Characteristics (depending on filler material):
• Reduced coefficient of friction, by producing a transfer film on the counter-surface (solid lubricant / solid lubricant friction)
• Dry friction
• Corrosion resistance
• Fretting corrosion resistance
• Wear resistance
• Reduced noise
• Radiation resistance

Materials that can be treated: All types of material that are subjected to friction.

Application examples: • Gun chargers • Breechboxes for automatic firearms • Fishplate pins for cranes • Oilfield connectors • Ball joints • Valve busbars • Slides • Mold linings

Organic coatings that use thermostable or thermoset polymers (PTFE, POLYAMIDE).

Characteristics (depending on filler material):
• Low coefficient of friction
• Seizure resistance
• Anti-adhesive
• Chemically inert
• Fretting corrosion resistance
• Food grade

Materials that can be treated: All types of metal supports

Application examples: • Injection molds • Valves stems • Hinge pins • Connector bushings • Ball joints • Bearings • Special screws and bolts • Automotive locking mechanisms • Brake linings • Food processors

Organometallic components resistant to severely corrosive conditions.

Characteristics:
• Excellent protection against corrosion (can withstand more than 1000 hours in salt mist test)
• Friction management
• No hydrogen embrittlement
• Good resistance in aggressive environments

Materials that can be treated: All types of metal supports

Application examples: • Fasteners • Clips • Washers • Circlips • Transmissions • Synchronizer rings • Bearings • Gasket holders • Springs • Locks • Various axles • Collars

STANAL 400™ is a solid-phase metal diffusion treatment applied at 400°C, which improves the seizure resistance of stainless steel parts, without altering their corrosion resistance.

Characteristics:
• Enhanced surface hardness
• Improved wear and seizure resistance
• Good intrinsic corrosion protection
• Excellent support of self-lubricating coatings

Materials that can be treated: • Austenitic stainless steels • Martensitic stainless steels • Structurally hardened stainless steels • Refractory steels • Steel alloys

Sample applications: • Electrical connectors • Ball joints for accommodating hot gases on jet engines • Hydraulic connections • Stainless steel bolts for the nuclear industry • Various parts for nuclear valves • Hinge pins for submarine doors • Fastening pins for steam turbine blades

Surface treatment that prevents wear and seizure of copper alloy parts. This treatment is applied by tin-based electrolytic deposition, after a diffusion treatment at 400°C.

Characteristics:
• Enhanced surface hardness
• Increased load capacity for lubricating films
• Reduced coefficient of friction during lubricated operation
• Excellent abrasion resistance

Materials that can be treated: • Bronze • Brass •Aluminum bronze • Aluminum nickel.

Application examples:
• Nuts and bolts for sanitary fittings • Bushings • Worm gear wheels • Spherical plugs • Backing plates • Pump bodies, Transmission synchronizers • Guide sleeves • Change speed forks • Check valves • Ring-type joints • Machine tool blanks • Locating bearings • Connecting rods, fittings • Valve guides

Chemical conversion of aluminum alloys that are free of hexavalent chrome, both in the deposition layer itself and in the products used to produce the layer. The layer’s performance in terms of corrosion, preparation, and electrical continuity make Corralu® B a future-proof solution for the aerospace sector. Corralu® B makes it possible to meet the requirements stipulated in the WEEE, RoHS, or even ELV regulations and directives.

Characteristics:
• Processing temperature of 30 to 40°C
• Layer weight of 300 g/m2
• Loose or attached application mode
• Temperature resistance up to 100°C
• Contact conductivity < 0.8 mΩ/cm2

Note:
Given its superb properties in this specific range, CORRALU® B meets the corrosion resistance requirements on a wide range of aluminum alloys used in the aerospace industry.

A nickel coating applied on aluminum or aluminum alloy parts provides optimal electrical conductivity.

Characteristics:
• Globular structure offering many contact areas between the connected surfaces (less contact resistance)
• High ductility and low residual stress
• Extremely high conductive stability at temperature

Materials that can be treated: • Pure aluminum • Type 6060 (AGS) aluminum alloys

Application examples: • Electrical connections with weak signals • Aluminum-copper electrical links • Power current transmission for aircraft with electrical flight controls and for railway equipment • Automotive connections

Electrolysis treatment in a molten salt bath produces a layer of iron sulfide on the surface of steel alloy parts to improve the seizure resistance of these parts and enhance the adhesion of lubricating films. The layer produced has excellent self-lubricating properties.

Surface treatment parameters:
Implementation temperature of SULF BT® is 190°C ± 5°C.

Note: This surface treatment can be applied on heat-treated steels with low-temperature tempering in particular.

Necessary precautions: SULF BT® is not suitable for steels with chrome content greater than 12%.

Application examples: • Case-hardened, surface-hardened gears • Camshafts • Engine liners • Ball joints • Tappets • Differential planetary gears • Differential spider gears • Cardan shafts • Shafts and bearings • Transmission forks • Transmission spacer rings

Graphite-based slide coating with a metallic binding agent.

Characteristics:
• Used for temperature applications, primarily in the glassware industry for gob transfer
• Significantly improves gob slide with perfect temporal regularity
• Excellent wear resistance
• Repetitive tool use after easy cleaning

Materials that can be used: • Steels • Cast-irons • Aluminum alloys
• Stainless steels

Application examples: Glassware parts, particularly for gob transfer

Dense metal, ceramic or cermet coatings produced by applying molten particles via a blown-arc plasma spray.

Characteristics:
• Refractory coatings
• Abrasion / erosion resistance
• Fretting corrosion resistance
• Wear resistance
• Corrosion resistance
• Conductivity and/or thermal or electrical isolation
• Improved friction properties in harsh environments

Materials that can be treated: All inorganic materials except copper

Application examples: • Thread guides • Waterproof fittings • Medical prostheses • Drawing dies • Clamping inserts • Bearing seats • Capstan rollers • Cylinders for printing and paper-making machines • Gasket seats • Bearings for friction in water applications • Furnace bearings

OXY ACETYLENE – ARC SPRAY

Metal and metal alloy coatings applied by spraying molten particles.

Characteristics:
• Wear resistance
• Corrosion resistance
• Conductivity and/or thermal or electrical isolation
• Enhanced friction properties in lubricated operation

Materials that can be treated: All materials, except copper

Application examples: • Capstan rollers • Cylinders for paper-making machines • Transmission synchronizers and forks • Fan blades • Turbo-compressor elements • Repair of worn parts or parts with machining defects • Hinge pins and joint stops

 Characteristics:
• Increased service life
• Increased resistance to friction-induced wear
• Increased resistance to material fatigue under non-uniform loads (flexion, torsion)
• Increased resistance to material fatigue due to rolling under heavy load
• Minimal deformation
• Highly or completely localized tempering as needed

Materials that can be treated: Carbon steels • Low-alloy steels • Cast-irons

Application examples: • Axles • Shafts • Gears • Axle journals • Wheel shafts • Camshafts • Crankshafts • Joint seats • Bearing seats • Cylinders • Cylinder rods • Gear racks

Characteristics:
• No surface oxidation; no intergranular oxidation
• Less deformation
• Elimination or reduction of grinding allowances
• Case-hardened bores, starting at a few tenths of a millimeter in diameter
• Control of the case-hardening depth ( ±5 / 100 mm)
• Good repeatability
• Easier protection of areas that should not be treated

Materials that can be treated: All steels: MnCr, MnB, NiCrMo, CrNiMo, etc. (each product has its own specific low-pressure carburizing range)

Sample applications: • Transmission pinions • Steering pinions • Power steering pump pinions • Nuts • Injectors • Sprayers • Pump bodies • Various gears • Bearing bushings • Wear bushings • Joint-seat bushings

Silver, tin, nickel, and copper alloy electrolytic coatings for electrical and mechanical applications.

Characteristics:
• Very good electrical conductivity properties
• Excellent friction properties
• Glossy or semi-glossy depositions
• Solderable depositions
• Ductile depositions
• Good accommodation and deformability

Materials that can be treated: All types of conductive substrates • Stainless steel when improved seizure resistance is required.

Sample applications: • Soldered connections • Crimped corrections • Connection lugs • Flexible connector strands • Manifolds • Contact blades • Weld-on brackets • Panel strips • Fuse terminals • Ball valves • Flexible braided connectors