Surface technology for the higheSt demandS

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At Betz-Chrom we give you the right advice from the start: As a specialist for galvanic hard chromium plating, galvanic nickel plating and the currentless nickel plating of metal surfaces with complex geometries, we start thinking about your needs right from the moment we receive your request. From raw material purchasing to technical processing, our galvanising master craftsmen, technicians and engineers will advise you according to your needs – on request also on site at your premises. The best fixture for your component is created on the basis of the jointly developed specifications.

your partner for cuStomer Specific Surface technology

Based on our customer oriented philosophy as an owner managed company, since 1952 we have employed around 75 people at our two locations in Gräfelfing and Maisach. With our production “100 % made in Germany“ we satisfy national and international customers - whether world market leaders or small businesses, regardless of whether small, medium or large quantities are needed.

At home in GermAny on the roAd All over europe for you

We know that innovation only comes through constant development – and that is why we are committed to the use of the latest technologies: Our technical expertise and years of experience are two of the many guarantees of our high level of customer satisfaction. The demands of our customers are what drive us to develop continuously new methods for processing technology. Therefore we work closely together with a wide ranging network of diverse suppliers and partners.

AlwAys with the lAtest technoloGy

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The surface finishing of steel parts to protect them against corrosion and wear is a worthwhile investment: Due to the finishing, the components become highly reliable, which in turn saves our customers the expensive downtime of their machinery.

In addition, the useful life of the components is extended. Thanks to regeneration, we can renew such protection even after several decades of operation - thereby saving our customers additional costs for the design and manufacture of a new component.

Surface finiShing: an inveStment that payS off

For over 60 years we have been making a wide variety of industrial machine products more durable, efficient and break resistant and less subject to friction, by means of the following technologies:

• Surfacetreatmentwith •Chemicalnickelmidphos •Chemicalnickelhighphos •Galvanicnickelsemi-gloss

• Multi-layerhardchromium

• Selectronprocess

• Hybridcoatingwith •Chemicalnickel •Galvanicnickel •Hardchrome

• Heattreatment

• Mechanicalprocessingbymeansof •Precisiongrinding •Superfinishandpolishing •Blasting

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precision processinG for optimum surfAces

AdvAntAGes of the superfinish process technoloGy• Smooth,lint-freefinishingoverthe entire surface• thedefinedbearingratiois produced• lowerfrictionofthe components reduces the energy consumption during use• surfacequalityupto mirror finish

preciSion grinding

precision technoloGy – mAde to meAsureModern CNC technology enables us to produce a variety of contours with high precision and quality. The technical application determines which surface characteristics must be fulfilled. As a result, our expertise is available to you in order to achieve your specifications regarding the surface structure.

mAximum dimensions• Ø850x4000mm

shApe And position tolerAnces, rouGhness• Roughnessaccordingtocustomer requirements • RZ2.0–3.5• Cylindricityand concentricity <0.01

SuperfiniSh and poliShing

polishinG/superfinish• Ø850x4000mm• Pieceweightmax.3,000kg• Roughnessaccordingto requirements Rmax<0.1,Ra<0.01,Rz<0.01• BearingratioRpk,Rvk,Rmraccording to requirements

GrindinG• CNC,NC,conventional• Pieceweightmax.3,000kg• Cylindricityand concentricity <0.01 mm

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hard chromium

the speciAl surfAce protection AGAinst weAr And corrosionThe predominant use for hard chromium coating is in areas subject to wear. The ability of chromium to form a dense oxide layer in combination with oxygen gives the hard chromium coating its very good corrosion resistance and anti-adhesive properties. The corrosion resistance characteristics can be even further enhanced through multi-layered coatings, with double and triple plating, also referred to as multi-layered hard chromium. The surface technology “Matt hard chromium” offers the advantage of a defined roughness depth, with which to improve for example the “grippiness” of feed rollers.

As complex chromium plating processes are not possible without anode technology this is exactly where our expertise in high quality coatings lies. Depending on the size and shape of the component as well as the surface to be coated, our in-house fixture design develops the required anodes according to the technical drawings. We are therefore capable of applying high quality, even coatings to parts with a wide range of geometries and internal diameters.

mAximum dimensions• Ø1300x4700mm Onhandling8000mm• Ø60x6500mm• Forms1700x1500x1300mm• Weightmax.5,000kg

coAtinG properties• Hardness1000±50HV0.1• Coatingthicknessdependingon requirements0.003to1.0mm• Roughnessaccordingtorequirements Rmax<0.1µmtoRz70µm

• Corrosionresistanceofthebase materialaccordingtoDINENISO 9227-NSS:>480hoursatMHC• Expansioncoefficient 6.6to8.4x10–61/K• Ductility0.1%Elongationatbreak• Wearresistance <5mg/1,000revolutions• Frictioncoefficient0.15lubricated, 0.21 dry against steel• Tensilestrength280to450N/mm2

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chemical nickel

the currentless methodDue to its amorphous structure, the nickel phosphorus coating has a high corrosion resistance protecting against a large number of corrosive media. Furthermore, the autocatalytic process offers the advantage that even complicated shaped work pieces are nickel plated with a uniform coating distribution. Additionally the coating provides good wear resistance, which can be significantly improved by targeted heat treatment. With our new sealant, especially for cast materials, we can additionally provide your chemical nickel surface with an organic, clear and transparent protective film. The corrosion resistance and appearance are thereby improved and the grip sensitivity is significantly reduced.

mAximum dimensions• Ø600mm,L=1100mm• Max.weight250kg

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galvanic nickel (Semi-gloSS)

Since the beginning of 2018, we have been using our new Galvanic nickel process. We offer you the process for rack and barrel goods. The environmentally friendly boric acid free process convinces with its excellent throwing power and coating distribution. The galvanic deposited coating not only has incredible optical properties due to the glossy coatings, but also the technical characteristics such as levelling, good ductility and good soldering base meet up to your requirements.

coAtinG propertiesBase material: all steels and non-ferrous metals• Boricacidfreeprocess (RoHScompliant)• Hardnessinthedepositedstate approx.450–600HV0.1• Coatingthicknessdependingon requirements0.003to0.100mm• Goodcorrosionresistance

mAximum dimensions• Ø600mm,L=1100mm• Max.weight250kg• Rackorbarrelgoods

chemical nickel mid-phoS-proceSS:

chemical nickel high-phoS proceSS:

mAximum dimensions for both processes• Ø600mm,L=1100mm• Max.weight250kg• Rackorbarrelgoods

lAyer properties• Basematerial: all steels and non-ferrous metals• Leadandcadmiumfreeprocess (RoHScompliant)• Rackorbarrelgoods• Phosphoruscontent6–9%• Sealingpossible• Hardnessinthedepositedstate approx.600HV0.1• Hardnessafterheattreatment approx.1000HV0.1• Coatingthicknessdependingon requirements0.003to0.050mm• Goodcorrosionresistance CorrosiontestDINENISO9227-NSS: >480hats/min=0.030mm (withoutheattreatment)

lAyer properties• Basematerial: all steels and non-ferrous metals• leadandcadmiumfreeprocess (RoHScompliant)• Rackorbarrelgoods• Phosphoruscontent10–12%• Sealingpossible• Hardnessinthedepositedstate approx.550HV0.1• Hardnessafterheattreatment approx.900HV0.1• Coatingthicknessdependingon requirements0.003to0.050mm• Verygoodcorrosionresistance CorrosiontestDINENISO9227-NSS: >500hats/min=0.030mm (withoutheattreatment)

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heat treatment: chemical nickel and hard chromium

The heat treatment process is employed with both chemical nickel and hard chromium process technologies. Heat treatment serves as a preventative measure for the resistance of high strength steel parts against hydrogen induced brittle fractures, in accordance with DIN 50969 (colloquially referred to as hydrogen diffusion annealing). Directly after nickel or chromium plating, the parts are placed in a furnace (between 120°C – 400°C) for dehydrogenation. By means of appropriate heat treatment, it is possible to extract the hydrogen absorbed during the coating process. The surface characteristics change very little. It should be noted here that with increasing coating thickness, the gas tightness of the coating increases.

Further advantages of heat treatment are that the adhesion and hardness of the chemical nickel coating increase. With heat treatment upwards of approximately 290°C, the hardness can be increased to about 1,000 (± 50) HV.

the hybrid coating:chemical nickel / galvanic nickel and hard chromium

The hybrid coating provides very good wear protection in combination with high corrosion protection. Here, all the advantages of hard chromium and chemical nickel or galvanic nickel are combined in one coating system. This combined coating satisfies the highest demands and is excellently suited for use in an environment with high chemical and mechanical loads.

mAximum dimensions• Ø600mm,L=1100mm• Weightmax.250kg

coAtinG properties• Hardnessinthedepositedstate 1000±50HV0.1• Coatingthicknessdependingon requirementse.g.0.030mm chemicalnickeland0.040mm hard chromium• Corrosiontest DINENISO9227-NSS>480h

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blaSting

Blasting is one of the mechanical pre-treatments in surface technology. The quality of the blasting is a decisive factor for the quality of the coating. The advantages of blasting include the thorough pore-deep cleaning of scaled, oxidised or nitrated surfaces. In addition, the process serves as adhesion improvement. The blasting process defined for the aerospace industry is extremely important. Betz-Chrom offers blasting according to various standards and pre-defined parameters.

hArd chromium:• Ø1300x4700mm• Weightmax.5,000kg• Hardness1000±5050HV0.1• Coatingthicknessdependingon requirements0.003to1.0mm• Standardhardchromium, 2-fold,3-foldorMHCmultilayer hard chromium• Hybridcoating, Chemicalnickel/hardchromium

GrindinG:• CNC,NC,conventional• Ø850x4000mm• Pieceweightmax.3,000kg• Cylindricityand concentricity <0.01 mm

polishinG/superfinish• Ø850x4000mm• Pieceweightmax.3,000kg• Roughnessaccordingto requirements Rmax<0.1,Ra<0.01,Rz<0.01• BearingratioRpk,Rvk,Rmr according to requirements

The new acquisition of worn out components is often expensive and complicated, especially due to the downtime of machines. we offer the perfect alternative to such a costly new acquisition:The high quality regeneration of your components at short notice by means of our individual surface treatment via rough grinding (if required galvanic nickel) hard chromium plating, finish grinding including superfinish, will bring your components back to their original dimensions.

regeneration: Wie neu – nur Schneller und günStiger

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humAn And technicAl expertise = QuAlityOur 75 employees work at the locations in Gräfelfing near Munich and Maisach in order to achieve this. We see ourselves as a company of craftsmen – albeit highly technical – and we therefore realise that our personnel is the most important asset. Numerous customer requests are produced by hand and detailed components are produced in small and medium quantities, also in large series as custom made products.

our Strength –the expertiSe of our employeeS

We take responsibility for our actions. For years, we have been committed to the sustainable use of materials, optimum protection of our employees and environmentally conscious management.Since2008wehavebeenworking 100% with green electricity. Our active energy management ensures annual savings in our gas and heating oil consumption. We are working in a targeted way to reduce and substitute hazardous substances. Lead-freecurrentless electrolytes ensure the RoHScomplianceofourcoatings.

economy meets ecoloGyThe design history of our logo also fits in with our green and sustainable awareness: With its armoured, hard and yet finely structured skin the rhino symbolizes our core competence –the surface finishing of complicated geometries.

It is therefore appropriate that we have taken over the sponsorship of the rhinoceroscalledNikolauswhois inthe“Hellabrunn”zooinMunich.

A loGo inspired by nAture• QualitymanagementISO9001• EnvironmentalmanagementISO14001• EnergymanagementISO50001• Safetymanagement

our certificAtions At A GlAnce

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unSere referenzen

betz-chrom Gmbh

factory 1 surface technologyAmHaag1182166GräfelfingnearMünchen

Tel.:+49(0)89898073-0Fax:+49(0)898541462

factory 2 mechanical productionOtto-Hahn-Strasse1682216Maisach

Tel.:+49(0)81415348390-0Fax:+49(0)81415348390-17

info@betz-chrom.de|www.betz-chrom.de