Zinc plating

Zn & Zn/Ni

We use zinc electroplating to add a zinc coat to materials (Zn and Zn/Ni), which serves as a base layer for further coating, or as a surface finish it gives products a more attractive appearance than in their unfinished state. In any case it fundamentally improves the mechanical and electrical properties of metals.

Advantages of zinc electroplating

  • improves the mechanical and electrical properties of metal
  • even a thin layer ensures great resistance to corrosion and other environmental influences
  • low economic costs
  • serves as a primer or final surface treatment
  • environmentally friendly technology of chromate coating without hexavalent Cr

Key properties of galvanisation with Lakum

  • rack and mass zinc electroplating
  • zinc plating of even large parts is possible
  • we ensure various degrees of corrosion resistance
  • combined with subsequent surface finishes we make your products “immortal”
  • we also offer blue and thick-layer passivation (chromate coating) and surface sealing with silicate paint

Anticorrosion according to your requirements

The galvanisation process is completely automated, but it can be modified in the individual phases. As a result, the individual galvanisation phases can be tailored to your requirements for the resultant quality and appearance of the products, and different levels of corrosion resistance can be achieved.

We protect small and large parts

Galvanisation is primarily suitable as a surface finish for metal parts, connection elements, anchoring elements, castings or forgings. So called passivation (chromate coating) or sealing using silicate paint may also be part of the galvanisation surface finish process.




Uses of zinc electroplating

  • all metal (magnetic) products for a widerange of uses in the automotive, construction, furniture, electrical engineering, mining and other industries
  • screws and metal fittings
  • ground anchors
  • garden furniture
  • construction and anchoring elements

Technological process of metal surface treatment by zinc electroplating or electrolytic plating Zn/Ni

  • chemical degreasing
  • two-stage flow rinse
  • pickling I
  • pickling II
  • two-stage flow rinse
  • electrochemical degreasing
  • two-stage flow rinse
  • decapping
  • one-stage flow rinse
  • zinc electroplating or electrolytic plating Zn/Ni
  • two-stage flow rinse
  • clarification
  • rinse with drinking water
  • chromate coating
  • one-stage flow rinse
  • one-stage flow rinse
  • sealing of chromates
  • drying
Technological process of metal surface treatment  by zinc electroplating or electrolytic plating Zn/Ni

production plantLakum - KTL, a.s.

In the Frýdlant production plant we use a timed production line with rackswhich is not suitable for small parts, fasteners or small stamped parts. For these purposes we use mass galvanisation in the affiliate companies Massag and Lakum-Galma.

Technical parameters of zinc electroplating at Lakum - KTL

Technology: Zn
Maximum dimensions of parts: 400 × 650 × 1 100 (w × h × l)
Maximum weight of part: 50 kg
Line performance per hour: 20 m2 per hour
Standard thickness of film: 8–12 µm
Lakum - KTL, a.s.

Ostravska 384
739 11 Frydlant nad Ostravici
Czech Republic

+420 558 442 222



production plantLakum - Galma, a.s.

We also have a timed and mass production line in the Humpolec production plant. Thanks to the fully automated lines we provide 24/7 production.


Technical parameters of zinc electroplating at Lakum - Galma

Technology: Zn, Zn/Ni
Maximum dimensions of parts: 450 × 1 200 × 2 750 (w × h × l)
Maximum weight of part: 240 kg
Line performance per hour: 55 m2 per hour
Standard thickness of film: 8–18 µm
Lakum - Galma, a.s.

Prazska 1648
396 01 Humpolec
Czech Republic

+420 565 536 807




We manufacture precision products of the highest standard for demanding customers.


We help you with the design and advise you during development.


The right employees are the best asset for us.


We meet the strictest demands of the automobile industry.


We work long term with the best manufacturers on the global market.

We are Lakum Group

Experience. Guarantee. Cost savings.

We are not just an ordinary supplier who makes products according to your requirement.
We are Lakum Group - an intelligent manufacturing company.

We have been
gaining experience
since 1998
Hundreds of millions of
of customers

We help customers implement their products
whilst preserving the highest standard.

We are precise down to the smallest detail.

We provide a complete service in the working of sheet metal, tubes, wire and surface finishes.
We help you with the design, advise you during development, ensure the pre-production phase and mass production.

We have been on the market for our customers since 1998.

The key employees have a lifetime of experience in the field.

We believe in long-term partnership, and customers do not leave Lakum.

We are not afraid of complicated projects - we always propose realistic solutions.

Lakum takes responsibility for the final guarantee. We guarantee our work, even in the case of any cooperation.

Meeting deadlines is crucial to us.

Production flexibility, conforming to the customer in terms of deadlines and changes in the course of production.

We fulfil what we promise, and we do not promise the impossible.


Surface finishes




We have several technologies under one roof - we will reduce your logistics costs.

What we cannot manufacture ourselves we can ensure in cooperation with our verified partners of long standing.

With regard to cooperation, our existing customers appreciate our active approach to specifications and assistance during the research and development of products.
We can also help you with logistics, assembly and other cooperation.
Another advantage of cooperation with us are the extensive possibilities for optimisation of production costs.

Active project consultation

Gaining of source materials for drawing up a price offer

Drawing up price offer in cooperation with technical department

Presentation of price offer

Negotiations about cooperation conditions

Supply of prototype items

Programme timetable

Evaluation of documentation and manufacturing feasibility study

Active cooperation with customer and proposals for component optimisation

Preparation of source materials for generation of price offer for sales department

Creation of internal technical documentation

Ensuring production of first prototypes

Optimisation of production procedure

Start of mass production

Creation of metrological programmes

Measuring of manufactured parts and presentation of results

Creation of documentation of manufactured part according to customer requirement.


Installation of airbags in car seats
Case study

Installation of airbags in car seats

A DEMANDING JUST IN SEQUENCE DELIVERY REQUIREMENT WAS MADE BY A KOREAN CAR MANUFACTURER. THE TASK OF DELIVERING AN AVERAGE OF 550 SETS PER DAY WHEN ASSEMBLING THE STEEL STRUCTURES OF PASSENGER CAR SEATS WAS FULFILLED BY LAKUM FROM 2011 TO 2014 TO THE FULL SATISFACTION OF THE CUSTOMER. Objectives and details of cooperation High flexibility in design and continuous adaptation of requirements. Design that exceeds the required capacity of 550 sets per day. At the peak of production, up to 900 sets per day were achieved. Adaptation of production to the indicated background in the company, which for the whole project amounted to 1,000 m2. In just two months, our team at Lakum-AP was able to build a new assembly line, train the operators and deliver this key component directly to the customer's assembly line. In record time we managed not only to meet the customer's requirements for a relatively complex production programme, but also to exceed expectations for the required production capacity.

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Hanon Systems / Pressing of metal parts
Case study

Hanon Systems / Pressing of metal parts

HANON, A DEVELOPER AND MANUFACTURER OF AIR CONDITIONING TECHNOLOGY COMPONENTS FOR THE AUTOMOTIVE INDUSTRY AND OUR LONG-TERM CUSTOMER, REQUESTS OUR SERIES AND PROTOTYPE PRINTED PARTS. Services which we offer and which are an essential part of any cooperation: During the initial request, we make a feasibility study and together with the design department we optimise the final shape of the prepared part. Processing of the required documentation and design of the production process according to customer requirements. Sampling before series production to check of the manufacturability of the part in the required quality. Description of the cooperation: Cooperation on a new project with the customer begins long before the call-off order itself is accepted for production, when a feasibility study and a capacity study are carried out. This ensures smooth delivery of the product in the quantity required by the customer. This corresponds to the preparation of the offer, including the possibility of further updates in the case of changes in the design or requirements. Sampling and documentation according to VDA and PPAP are a matter of course. We place great emphasis on the precise fulfilment of customer requirements and 100% quality control. We ensure this through 3D measurements, strength tests, corrosion resistance tests, surface quality tests and visual inspections of each part. It is a matter of course to meet delivery deadlines and ensure trouble-free deliveries, including the traceability of the process. Case study: Production of a sleeve for attaching air conditioning lines The finished part goes into the final product of the vehicle air conditioning system. A possible product failure could lead to malfunctions in the air conditioning circuit. Requirements for precise processing are indispensable. To ensure the quality and regularity of series deliveries for the customer, processes were optimised in the pre-production phase. Cooperation details: Cooperation started as early as during the construction of the part by the customer, when we eliminated the possible occurrence of cracks on the reinforcement edges during the jointly designed execution. Implementation of the documentation required for the production process, including an inventory of the technological flow, FMEA, OEE control plan and packaging regulations. Evaluation of the sampling and assurance of the required quality through the PSW (Part Submission Warrant) document. Ensuring the quality and supply of raw materials, semi-finished products, cooperation, process tools and measuring equipment. Pressing was carried out on a crank press with feed and straightening line using a customised process tool. Ensuring the required accuracy of the product, including checking the grip strength when assembling the sleeve. Removal of sharp edges and burrs from the part to ensure safety and to comply with the requirements of the standard for surface treatment according to automotive sector standards. Protection of the product with a cataphoretic coating, which gives the raw product excellent anticorrosive properties in spite of the minimal layer thickness. This is proven by corrosion resistance tests. Final assembly of the soft component that is in direct contact with the air conditioning pipe. Before final delivery of the part, final quality control of the output and an evaluation of the repeatability of the process is also carried out. We return to the input operations and introduce the documentation required for the process. The customer then appreciates the careful evaluation of the sampling and quality assurance, which is provided by the PSW (Part Submission Warrant) document.

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Sodecia / anti-corrosion surface treatment
Case study

Sodecia / anti-corrosion surface treatment

Since the start of our business relationship with the company Sodecia we have implemented 43 projects for leading automobile manufacturers. In practice, this means more than 25,963,583 surface finished parts. Project of surface finish for mass produced parts: End customer automobile producer FORD requires surface finish complying with high standards and norms. It involves a combination of two technological procedures: ● zinc electroplating according to standard FORD WSS-M1P85-B3● cataphoretic painting according to standard FORD WSS-M2P177-C3 Project of surface finish of special material: The requirement for coating of product Sodecia for AUDI was demanding in many respects. The product requires coating according to standard VW13750 Ofl x634 with minimum coating thickness of 35 microns. As this is a relatively large flat part, moreover made of the special material CR3-EG47/47-E-PO, coating in the required scope is technologically demanding. The preparation of the entire process required a large volume of sampling. Thanks to the experience of our experts, we discovered during the sampling that the product is susceptible to scratching. We fine-tuned the parameters and details of the entire process. We included a completely new product packaging approach in the process, and damage has no longer occurred. Completed, coated components reach the end customer at the assembly site in good order and with no faults caused during transport.

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