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Mobil Mobilarma 525

Rust Protection Lubricant

Basic Identifiers

ID Type BO
12798 anti-rust protection mineral


Mobilarma 500 Series oils are premium performance products primarily intended as run-in or lay-up lubricants, which provide effective rust preventive films on the internal surfaces of machinery. They are particularly suitable as run-in lubricants for diesel and gasoline engines. The oils displace water from metal surfaces and form strong water-resistant films on the metal surfaces to prevent rust and corrosion. The Mobilarma Series oils absorb the water in systems into a water-in-oil emulsion so that the contact surfaces of the machinery still get satisfactory lubrication. Their high level of chemical stability and their anti-wear and detergent properties make them suitable as high quality short-term lubricants.

In most applications, the residual rust preventive films need not be flushed away when the assembly is filled with lubricating oil or hydraulic fluid and put back in service. However, flushing with a charge of lubricating oil to remove the Mobilarma product or its residual film, is recommended if:

1. The Mobilarma does not provide the required lubricant characteristics to operate the equipment at rated loads and temperatures 2. Draining of the equipment is difficult and considerable pockets of the Mobilarma cannot be easily removed 3. Contamination of the system oil by the Mobilarma could reduce the lubrication performance characteristics (examples; Mobilarma could increase Freon cloud points in compressors or water-in-oil emulsions reduce anti-wear characteristics in high pressure hydraulic systems) 4. Presence of the rust preventive agents reduces the ability of the new oil to separate water in turbine and similar equipment.

Technical specifications

Specs Typical Values
Flash Point (in C) 198
Pour Point (in C) -36
Viscosity at 100C 8.7
Viscosity at 40C 53.5
Viscosity Index 100
ASTM D341 Viscosity Chart
ASTM D341 Logarithmic scale

ASTM D341 Viscosity Calculator

You may calculate the viscosity of the oil at various temperatures based on ASTM D341. This uses the two sets of calibration data that we already have in order to calculate the viscosity at any temperature. You may input multiple temperatures at once, seperated by comma.


Format Type File name Language File size
PDS Mobilarma 500 Series.pdf English 14 KB
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