Croda Lubricants

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Crodacor WS1 Water-soluble Corrosion Inhibitor Package

Leading the way naturally

Crodacor WS1- Water-soluble Corrosion Inhibitor PackageCrodacor WS1 is a corrosion inhibitor package that provides excellent ferrous corrosion protection for aqueous lubricants. Crodacor WS1 is a pre-neutralised liquid product that can be added to lubricant formulations at room temperature without the use of amines.

Features and Benefits The potential benefits of using Crodacor WS1 include: l Provides excellent ferrous corrosion performance in water-based lubricantsl Low foaming tendenciesl Saves processing time by eliminating heating, blending and solids handlingl No handling of hazardous aminesl Contains no secondary amines, nitrites, borates, metal, sulfur or phosphorous

Applications for Crodacor WS1 Croda recommends Crodacor WS1 for use in the following applications: l Metalworking fluidsl Aqueous hydraulic fluidsl Engine coolantsl Metal cleanersl Die cast release agents

Typical Properties

Cast Iron Chip TestThe images below show how Crodacor WS1 performed in the cast iron chip test (ASTM D4627). The test was performed at 1:70 dilution of Crodacor WS1 in 100ppm hardness water. Crodacor WS1 provided full corrosion protection at this dilution (figure 1).

Crodacor WS1 Industry standard corrosion inhibitor package

Figure 1. Cast iron chip test, 1:70 dilution in 100ppm hardness water

No corrosion inhibitor package

Appearance @ 25°C Clear liquid, free from haze and sediment

Acid value (mgKOH/g) 95

Hydroxyl value (mgKOH/g) 187

Flash point (°C) >100

Colour (gardner) 3.5

pH (1% aqueous solution) 9.0

Galvanic Corrosion TestCroda has developed a test method to evaluate the performance of corrosion inhibitors in preventing galvanic corrosion. The test method involves replacing the paper disc used in the cast iron chip test with a stainless steel or aluminium coupon. After the aqueous solution evaporates, the cast iron chips are removed and the rust formation on the panel evaluated.

At a 1:70 dilution of Crodacor WS1 in 100ppm hardness water, Crodacor WS1 provided full corrosion protection (figure 2).

Foam Performance - Waring BlenderFoam performance is critical when formulating metalworking fluids. Additives must not create foam and should not act to stabilise foam. The foaming tendencies of Crodacor WS1 were evaluated using a Waring Blender test. The test solution consisted of 1.5% Crodacor WS1 in 100ppm hardness water.

Crodacor WS1 creates 40% less foam during initial agitation compared to an industry standard corrosion inhibitor (figure 3) and the foam created by Crodacor WS1 collapses faster than that of an industry standard corrosion inhibitor, meaning the foam is less stable (figure 4).

Crodacor WS1 Industry standard corrosion inhibitor package No corrosion inhibitor package

Figure 2. Galvanic corrosion test, 1:70 dilution in 100ppm hardness water

Figure 3. Waring blender foam test – initial foam Figure 4. Waring blender foam test – time taken for foam to collapse

Crodacor WS1 Crodacor WS1

Initial Foam Time to Zero Foam

Industry standard corrosion inhibitor package

Foam

(ml)

Tim

e (s

)

Industry standard corrosion inhibitor package

80

115

135 140

Sales and technical supportWith over 30 years experience of working with lubricant formulators, Croda’s global technical specialists are able to offer advice and support in selecting the most effective products for your application. This, coupled with our extensive sales network, means we have the ability to offer the broadest range of products. Make Croda your partner of choice. Further informationFor more detailed product information, regulatory status, MSDS and samples please contact your local Croda Sales Office or visit our website www.crodalubricants.com. Alternatively, you can email us at lubricants@croda.com.

Non-warranty

The information in this publication is believed to be accurate and is given in good faith, but no representation or warranty as to its completeness or accuracy is made. Suggestions for uses or applications are only opinions. Users are responsible for determining the suitability of these products for their own particular purpose. No representation or warranty, expressed or implied, is made with respect to information or products including, without limitation, warranties of merchantability, fitness for a particular purpose, non-infringement of any third party patent or other intellectual property rights including, without limit, copyright, trademark and designs. Any trademarks identified herein are trademarks of the Croda group of companies. ©2012 Croda Europe Ltd 04/12 LMB028v1