FED-STD-791D
Method 5321.2
September 30 1986
CORROSION OF LEAD BY LUBRICATING OILS
1. SCOPE
1.1 This method is used for measuring the corrosiveness of lubricating oils on
lead in the presence of a copper catalyst.
2. SUMMARY
2.1 It consists of rotating panels of lead and copper in the test lubricant under
specific conditions, and determining the degree of corrosion from the change in weight of
the lead panel.
3. SAMPLE SIZE
3.1 Approximately 500 mL of the oil to be tested.
4. REFERENCES, STANDARDS, AND APPARATUS
4.1 Sample tube, SOD (Standard Oil Development), available from Koutes Co.,
Spruce St., Vineland, NJ 08360 or SGA Scientific, Inc., 735 Broad St., Bloomfield, NJ
07003 (see Figure 1).
4.2 Bath, constant-temperature, 163 " 1C (325 " 2F), minimum depth 31 cm
(12 in).
4.3 Motor, stirring, 600 " 50 rpm.
4.4 Shaft, stirring, with attaching hardware (see Figure 2).
4.5 Air supply, clean, dry, approximately 7 gage kPa (1 psig) to provide flow of
0.940 " 0.047 L/min (2 " 0.1 ft3/h).
4.6 Balance, sensitivity "1 mg.
4.7 Forceps, stainless steel.
5. MATERIALS
5.1 CAUTION: SOME MATERIALS ARE TOXIC AND HAZARDOUS. The
materials references and standards listed in this section must be handled carefully.
Federal Test Method 10000, Material Handling Safety Precautions, is a reference which
lists all toxic and hazardous materials cited in FTMS 791. The synonyms, life hazard,
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