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Loctite polymer composites from Henkel have enabled a major UK automotive manufacturer to save 30 per cent on pump energy costs. The products are used on components within a process water pump — including castings, impellers and volutes that have worn due to corrosion — to rectify any mechanical damage.

To demonstrate potential gains, Eriks suggested evaluating the efficiency of one of the company’s pumps — a 22kW Elpo pump. It was found to be under-performing by a minimum of 30 per cent against the manufacturer’s original test data.

The unit was dismantled and components examined for wear. This revealed heavy corrosion, with the pump impeller worn, burred and imbalanced. The mechanical seal had seized and the pump was out of alignment with the motor. In addition, the volute was cut-water worn, the bearings showed evidence of fretting and corrosion and the motor was not inverter rated.

Loctite 7515 was used to pre-treat the substrates to prevent corrosion and improve adhesion between the metal parts and the polymer composites. Loctite 7117 was then applied as a ‘hold coat’ to smooth the surface imperfections and to provide a key for the thicker layers required to return the pump to its original dimensions.

A ‘build coat’ of Loctite 7226 was used to replace many years of wear and to create a tough surface that is resistant to future wear.

Key benefits of product application

  • Loctite 7226 offers advantages over traditional repair methods such as hard metal welding or flame spraying — both of which are difficult and costly to apply to large surfaces.
  • It is easily applied on all surface sizes and offers the extra benefit of corrosion protection; it does not create any heat stress during its application.
  • The trowelable and non-sag epoxy protects against fine particle abrasion.
  • The range provides a choice of grades for fine particles through to coarse and also specific products for pure chemical attack, corrosion protection and high impact.
  • Temperature resistance typically extends from -30°C up to +120°C, with special grades available that can be used up to +230°C.
  • The products provide good protection against fresh and sea water, ammonium sulphate and sodium hydroxide.
  • The cost of the repair amounted to £5,542, but offsetting this, in the first year alone, was an estimated energy reduction of £3,936.
  • The manufacturer is now evaluating the potential energy savings that could result from more pumps receiving the Loctite treatment from Eriks.

Henkel is the world market leader in state-of-the-art industrial adhesives, sealants and surface treatment products for a wide variety of engineering applications. Its leading brands for the industrial market are Loctite, Bonderite, Teroson, Aquence and Technomelt.

Strong customer focus, research and innovation, consistent quality and sustainable business practices have contributed to its record of success, as has continuous improvement in both its products and methods of manufacture.

The company applies its expertise to the entire value chain across the engineering sector. Whatever you build, manufacture, assemble or repair, its technical consultancy service will provide all the assistance and training you need to ensure you have the best product and the skill to apply to its best advantage.

Henkel brands are internationally renowned for their proven reliability and performance and the scope of the company’s product programme extends from cleaning and pre-treatment through to bonding, sealing, filling and protecting, coating and lubricating. 

Henkel is the only adhesive manufacturer to offer a comprehensive range of products that are hazard-label free. Its Loctite Health and Safety series is suitable for the lion’s share of engineering applications and includes thread lockers, thread sealants, gasketing adhesives, retaining compounds and instant adhesives.

As both the product and its method of application dictate the quality of process, Henkel also has considerable expertise in the supply of dedicated dispensing equipment that, if necessary, can be bespoke to the application. This equipment ensures the product is applied quickly, cleanly, accurately and economically.

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