Keradouce® coating PDF brochure

The KERADOUCE® rod coating

Douce Hydro’s Innovation and Unique Technology

 

Your problems:	CORROSION, ABRASION, IMPACT, SCRATCH, WEAR, SIDE LOAD … on the rods of the cylinders.
Our solution:	The KERADOUCE® rod coating.

Developed by Douce Hydro Research & Development team, the KERADOUCE^® coating is a multilayer coating, water proof and very hard, which is applied on the rods of hydraulic cylinders, and has an excellent corrosion resistance. It is homogeneous, uninterrupted, non-conducting, flexible enough to support functional rod bending, and ecological.

The KERADOUCE^® coating is our answer to a growing demand from our customers for hydraulic cylinders that are working in very harsh environmental conditions such as:

• Civil Engineering applications (Dams, Lifting/mobile bridges, sluice gates & waterways …)

• Marine applications (vessel doors, ramps, cargo bilges panels handling, seaport cranes, sail tensioners, dredges …)

• Offshore applications (riser tensioners, linear chain jack mooring systems …)

• Outdoors Lifting-handling (truck clamping, cranes, forest equipments …)

• Tunnel boring machines

• Steel work and aluminium industry

• And any other applications where corrosion, abrasion, impact, wear, scratch and/or side load are a real problem for the rods of the cylinders.

Douce Hydro benefits today of over 17 years of experience of this coating in the field with many references all over the world. It will gradually replace all other coatings such as nickel and chrome.

COATING COMPARISON MATRIX :

 

		Chrome	Nickel Chrome	Keradouce®
	Corrosion Resistance	«	««	««««
	Scratch Resistance	«	«	«««
	Abrasion Resistance	«	«	««
	Wear Resistance	«	««	«««
	Elasticity	«	«	«
	Impact Resistance	«	«	««
	Surface Finish (Ra/Rt)	««	««	«««

Mechanical Characteristics of the Keradouce® coating :

 

	Standard thickness	300 µm = 0.012 inch
	Hardness	900 HV 0.3 = 67 HRC (Rockwell C)
	Standard surface finish	Ra = 0.1 to 0.2 µm = 4 to 8 µ inch
	Adherence following norm NFEN 582	>50 Mpa = 7,250 psi
	Corrosion resistance into acetic salt fog test (AS® G85 Appendix A1.2, B 117, B 287, DIN 50021, NF ISO 9227, NF ISO 3768 & 3769)	Minimum 1,000 hours Up to 2,000 hours(*)
	Application type	Corrosive environments, extreme environmental conditions such as marine, sea ports, offshore, steel works…

Dimensions : Up to very large dimensions (up to 24 meters / 80 feet)

Testing of the Keradouce^® coating : Douce Hydro has extensively tested its Keradouce^® coating, to prove our customers that our coating is the best solution on the market for your harsh environmental application. We would be happy to meet with you and explain and show you all the extensive testing the Keradouce^® coating has undergone.

 

KERADOUCE® Stainless steel Z3CND2205 + Cr 60µm Ni + 40 µm Cr 40 µm Ni + 20 µm Cr 35 µm Cr 20 µm Cr

 

Chrome plated rod

Rod with KERADOUCE®

 

After 2000 hours in salt spray test