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Protective Coatings

Protective Coatings Metallic and nonmetallic materials are exposed to a wide variety of threats throughout the duration of their service life. In particular, mechanical, thermal, chemical, environmental and physical stress contributes to the premature deterioration of these materials.

Installing a suitable protective coating system is an essential step in protecting valuable metal assets from exposure to adverse conditions. By effectively extending thier service life with protective coating systems, investors establish a safeguard against the otherwise imminent  financial losses associated with failed coating systems.

While protecting new surfaces is obvious, a maintenance strategy for existing coating and lining systems is often neglected. Existing systems must be regularly inspected for a broad range of factors known to impact their longevity and performance including visible coating deterioration and corrosion, coating thickness, coating adhesion, and surface preparation. A maintenance strategy will detect any potential problems so they can be addressed before they escalate into severe conditions that are time consuming and costly to remedy. 

KONTROL SERVIShelps investors avoid unplanned shutdowns and exorbitant financial losses associated with repairing or replacing failed protective coating systems.  Specifically, we perform coating condition assessments to develop recommendations for new protective coating systems as well as for the maintenance, repair or replacement of existing coating systems. This includes coating system selection, product procurement, as well as installation supervision to ensure compliance with manufacturer specifications.

Industrial Application of Protective Coatings


Impellers, turbine blades, etc. - properly chosen and applied ceramic coatings are critical for prolonging the life of metals that are exposed to continuous immersion in liquids. Ceramic coatings are resistant to wear, abrasion, cavitation, corrosion, and high temperatures.

  lopatky turbín   oběžné kolo čerpadla

Chemical and pharmaceutical

Storage tanks, containers, silos, reactors, etc. - properly chosen and applied linings protect the inside of these structures. Performace benefits include high resistance to chemicals, abrasion, mechanical damage, excessive temperatures and oxidation.

  • Agitators – due to the contanst immersion of these devices, ceramic coatings are recommended. 

  reaktorová nádrž    reaktorová nádrž


Food Equipment


  • Hoppers, chutes, conveyor augers, presses, etc - non-toxic, high quality, properly applied teflon coatings are recommended for materials that come into contact with food. These coatings are resistant to high temperatures, reduces product adhesion to the surface of workspaces you zajiszí proper function and durability.

  nasýpky   lisovací šnek

Road Maintenance & communications

  • Plows(front and rear blade), hoppersfor spreading material, etc - properly selected protective coatings protect against abrasion resistant and corrosive thereby extending the service life of the equipment.

   pluh s oboustranným výhozem    pluh s jenostranným výhozem

Automotive Bodyshop

  • Hangers, hooks, etc - Fluororesin coatings are highly recommended due to unique properties that reduce the frequency and the time required for cleaning, water consumption, cleaning and pressure resulting in lower total costs.

Personal & corporate auto fleets

  • Inspection of the coating thickness prior to the purchase of a used vehicle will inform you if body repair and painting have been previously performed. 
  • Inspection and supervision of coating applications on vehicles (i.e., trailers, cargo spaces, passenger and commercial vehicles). Protective coatings maximize surface resistance and protect against adverse conditions associated with high speeds and variable weather conditions. Cargo spaces are particularly prone to corrosion due to repetitive transporation of heavy loads and frieght handling. The proper application of protective coatings maximizes service life. 


Surface hardening protective coatings

Hard Chrome plating

Industrial chome plating is used on surfaces that require extreme hardness and corrosion resistance.

Advantages include extreme surface hardness, wear resistance, corrosion resistance, and minimal friction. 


  • Construction industry– spherical bearings - these bearings are suitable for use on steel structures and industrial facilities. The steel properties of low friction and surface hardness translate into significant savings on structural pillars and supports.
  • Engineering industry- hydraulic cylinder rods and tubes, motor shafts, dies, bearings, railway wheels etc. 
  • Parts for the aerospace, textile, and paper industries, molds for rubber and plastics industries, and many other applications

Chemical nickel plating

Highly resistant to corrosion due to its low porosity. The paint may be thermally hardened up to 1000 HV. Its characteristics include high resistance to abrasion, surface lubricity, semi-gloss and high-gloss sheen, and non-toxic oil.


Used in numerous applications, especially when extreme hardness and corrosion resistance are required.

Types of coatings

Protective coatings are categorized by their chemical properties and belong to one of the three following groups:

Non-metallic inorganic coatings

Non-metallic inorganic coatings and layers protect the underlying material due to its impenetrability of corrosive agents, higher corrosion resistance corrosion and passivation of metal surfaces protected.

Categories of non-metallic inorganic coatings:

  • Conversion layers- phosphating, chromating, burnishing, decorative anodising and hardening
  • Ceramic coatings - nonmetallic inorganic coating forming massive molten metal layer on the substrate (barrier effect). Ceramic coatings provide corrosion protection in the environment of organic, inorganic acids, water, hot steam condensation, mineral water, alkaline solutions, condensates and 2SO4 gaseous halogens.
  • Inorganic coatings- coatings are based on an inorganic substance. Examples include:
    • Water glass coatings
    • Silicic acid based coatings
    • Portland cement coatings
  • Linings and tiles - a special group of protective coatings. Basic metal coating or affixes of the vyzdívkou line of tiles or bricks made from stoneware, porcelain, glass or kyselinovzdorného concrete. The connection is carried out by using inorganic or resin mastics. They are intended for heavy corrosive conditions, in particular where the abrazivnímu occurs or the thermal influence of the environment.

Metallic coatings

Metallic coatings are used to improve the properties of structural materials such as corrosion resistance, appearance, mechanical erosion resistance, electrical conductivity, etc.

Categories of metallic coatings:

Galvanic coatings:

Suited for bearings and metal parts that are exposed directly to humid or corrosive environments. Coating provides protection against water, condensation, and slightly alkaline or acidic cleaning agents.

Types of galvanic coatings:

  • Protective(corrosion protection) - typical coating properties include zinc and cadmium, nickel, two-component coatings copper-nickel, and in some cases silver, gold,and platinum.
  • Decorative(rotection and aesthetics) – for steel and non-ferrous metals can be used in addition to single-component coating (nickel, chrome) and multicomponent coatings (copper-nickel-chromium, nickel-chromium, such as cars)
  • Specialfor example, protection against wear (hard chrome), to obtain a special magnetic properties (coating of pure iron), etc.

Hot dip coating in molten metals

  • Galvanizing - excellent corrosion resistance.
  • hot-dip tin - primarily focused on plating metal (called a white sheet) and equipment in the food industry - glossy surface corrosion resistant, non-toxic coating.
  • hot leaded - leaded plates are used for manufacturing tanks and equipment for the chemical industry due to good lead resistance against sulfur compounds - coatings highly resistant to aggressive atmosphere, suitable for food industry
  • hot hliníkování - corrosion-resistant and heat-resistant coatings.
  • zinc alloy plating Zn - coatings containing 5 -50% Al. Corrosion resistance Zn50Al to 2.5 times higher than in the zinc coating

Thermal sprayed metal coatings

The coatings thickness may range from thin to thick. Coating properties include zinc, aluminum, silver, copper, bronze, coatings based on Mo, or bronze alloy composition.


  • Protection against corrosion and high temperatures - noble metals, inert ceramic or plastic can be used as the base material protection against corrosion in different environments - distribution and rotating gas turbine blades, furnace systems, components and combustion chambers of jet engines.
  • Renovation of machine parts - the renovation of worn parts (bearings, pins cylinders, plungers, pistons, etc.)
  • Repair of damaged or porous castings, special mold ap.

Organic coatings

The most widely used method of surface protection (80-90% of all coatings) is organic based coatings.

Surface properties: high protective efficacy, ease of implementation, specific properties (conductive, fungicides), safety features (depending on the type of paint or by technology type)

Important is the finish before painting. Since the surface treatment is expected to remove scale, corrosion products, dust, fly ash, grease, old paint residue.

The number of layers and thickness of coatings are selected according to the environment, the type of coating system required service life and performance of the coating layer and multilayer (filling, cement, base and topcoat)

  • Fluororesin coatings– through a combination of unique properties (nepřilnavost together and heat and chemical resistance) these materials are interchangeable and are used across the spectrum of industrial production.

Please contact us for technical assistance or consultation. Properly selected and regularly inspected protective coatings prevent unexpected costs.