Terex RT200-1, Operator'S Manual

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Chrome Cylinder Rod Storage
Hard chrome plating is primarily applied to steel cylinder rods for its wear resistant
properties, although it does provide considerable corrosion resistance as well. Once the
chrome-plated rod is assembled into a cylinder and put into service, the hydraulic fluid on
the surface of the rod provides all the corrosion resistance required for the rod during its
life cycle. As a cylinder cycles, hydraulic fluid is driven into any surface cracks that exist in
the chrome plate. When these cracks are filled with hydraulic fluid, moisture or corrosive
fluids can not penetrate the cracks. However, some machining and cleaning operations can
negatively impact the future corrosion resistance of chrome-plated shafting. For example,
additives such as chlorine, sulfur, and sodium found in Extreme Pressure (EP) coolants and
some washing solutions are known rust accelerates and can strip chrome plating from the
base metal. Cleaning processes, such as phosphate washing are also known to be
detrimental to the corrosion resistance of hard chrome plated shafting.
If the rod is not periodically cycled and is subject to a corrosive environment, moisture and
oxygen can work its way down through the chrome layer and begin to corrode the base
metal. Brand new equipment may be stored outside for a considerable period of time at the
equipment dealership before it is sold. During these times, a protective barrier must be
applied to the exposed cylinder rod. This protective barrier will preserve the integrity of the
chrome plating by preventing the elements of corrosion from getting to the metal substrate.
Cylinders should be stored in the retracted position, if at all possible. The steps outline
below cover the procedures to be followed for protecting New Equipment from corrosion if
it must be stored in the extended position:
1. Position the equipment as it will be stored and identify all the exposed portions
of the chrome plated cylinder rods.
2. Clean any dirt and dust from the exposed portions of the cylinder rods using a
dry cloth or a cloth which has been dampened with an appropriate solvent. Do
not use caustics or acids.
3. Apply a thin coating of “Ferro-Kote 5856-BF” to the exposed surfaces of the
chrome plated cylinder rods. The ferro-Cote may be thinned using a 40%
Kerosene or no. 1 fuel oil mixture.
4. Inspect the cylinder rod surfaces and reapply at three to six month intervals.
5. If the equipment is to be moved and then stored again for an extended period
of time or if the cylinder is cycled, steps 1 thru 4 should be repeated for all
cylinder rods that were exposed.
*Ferro-Kote 5856-BF is a product of Quaker Chemical Company,
Conshohocken, PA 19428
For the protection of Older Equipment that is to be stored, the procedure
outlined above can be used, but greater attention to cleaning the exposed
Maintenance
192 P/N 12261-319 REVISED: August 2012
Courtesy of Crane.Market