NEM Chapter 233, ICE Flashcards
Cooling system should be clean so that the inhibitor will be able to act on the ___
Bare metallic surfaces of the water jacket
Make-up water must be checked for ___ prior to adding it to the engine
Chloride concentration and conductivity
Make-up water max conductivity
150 micromohs/cm
Make-up water max chloride concentration
60 ppm
The primary cooling system must be mechanically tight to prevent ___
Leaks of coolant out of the system
Leaks of combustion gasses or air into the system
Any engine experiencing corrosion, erosion, scaling, or sludging conditions should be thoroughly examined to determine the cause. The CO should ___
Report the facts to the SFLC Product Line
If it is necessary to acid clean the cooling system of an ICE, the ___ should request assistance of the ___
CO
SFLC Product Line
Used for acid cleaning badly scaled engine cooling systems
Inhibited hydrochloric acid
Acid cleaning is authorized only at ___
Repair facilities, shipyards, or contractors specializing in this service
SFLC Product Lines are authorized to provide additional water treatment instructions in areas of ___
Adverse water conditions
Engine J/W systems shall never be directly connected with the ___
P/W supply
PPE for handling inhibitors, inhibitive antifreeze, or testing chemicals
Rubber gloves, a face shield, and an apron
If alkalis contact the skin, flush the area with cold water until ___
The slippery feeling disappears
Blend of inhibitor chemicals in aqueous solution. The major components are: Sodium nitrite, sodium tetraborate, sodium silicate, sodium mercaptobenzothiazole (MBT), and tolytriazole (TTZ)
NALCOOL 2000 and PENCOOL 2000
Sodium nitrite aids in the formation of a ___
Protective oxide layer of ferrous surfaces
Helps prevent cylinder liner pitting and cavitation
Sodium nitrite
Sodium tetraborate is used for ___
pH buffering
Sodium tetraborate works by ___
Neutralizing acidic byproducts resulting from the products of oxidation
Cause of acidic byproducts in coolant
Blow-by gasses
Sodium silicate forms a silicate film on ___
Anodic metal surfaces
MBT and TTZ form thin film protective layers on ___
Copper and copper alloy surfaces
The use of NALCOOL 2000 and PENCOOL should be limited to engines that don’t have ___
Wetted aluminim surfaces or components in the cooling system
Reason NALCOOL 2000 and PENCOOL shouldn’t be used in systems with wetted aluminum
Sodium silicate is not in high enough concentrations to effectively protect aluminum surfaces
NALCOOL 3000 and PENCOOL 3000 contain what that the 2000 products do not?
Compounds that prevent the formation of precipitates and gel deposits
Typically the formation of precipitates and gel deposits in coolant is caused by ___
High concentrations of salts in aqueous solution resident in a corrosion inhibitor combining with corrosion inhibiting chemicals resident in antifreeze or salts resident in hard water combining with the chemicals
NALCOOL 3000 and PENCOOL 3000 should be limited to engines that don’t have ___
Wetted aluminum surfaces or components in the cooling system
MIL-A-53009 Corrosion Inhibitor is limited to engines that are ___
Not prone to cylinder cavitation and do not contain wetted aluminum parts or components in the cooling system
Utilizes the chemicals sodium metaborate, potassium silicate, and mercaptobenzothiazole (MBT)
MIL-A-53009 Corrosion Inhibitor
Alkaline buffer which neutralizes acid byproducts from blow by gasses leaking into the coolant
Sodium metaborate
Potassium silicate provides good corrosion protection for ___
Mixed metal systems
Contains sodium nitrite, sodium hydroxide, and sodium silicate
NALFLEET 9-111 Inhibitor
NALFLEET 9-111 is an effective inhibitor for cooling systems with ___, because of ___
Wetted aluminum surfaces
High concentrations of sodium silicate
NALFLEET 9-111 should never be mixed with ___
Anti-freeze
An ethylene glycol-based inhibitive antifreeze that is available through the stock system
A-A-52624 TYPE I Inhibited Antifreeze
Mixtures of A-A-52624 Type I, used with NALCOOL or PENCOOL is authorized for engines ___
Prone to cavitation that don’t contain wetted aluminum surfaces that require freezing protection
Premixed 50/50 solution of ethelyne glycol in de-ionized water
Caterpillar Extended Life Coolant 50/50 Premix
Includes carboxylates, nitrites, tolytriazole, and silicates
CAT ELC
Purpose of carboxylates
Ferrous metal and aluminum protection
Purpose of nitrites
Ferrous metal protection
Purpose of tolytriazole
Yellow metal protection
Purpose of silicates
Aluminum protection
Inhibitor used in most 87 WPB engines
Glysacorr G93, by BASF, inhibited antifreeze
Requests to use other corrosion inhibitors shall be submitted to the ___, which will forward the request to ___. It must be accompanied by ___
Cognizant SFLC Product Line
SFLC ESD
Written testimonial from the engine manufacturer
Antifreeze shall be used on ___
Boats less than or equal to 65 ft
All engines that utilize keel coolers
