ASTM D4627-92(2002)
(Test Method)Standard Test Method for Iron Chip Corrosion for Water—Dilutable Metalworking Fluids
Standard Test Method for Iron Chip Corrosion for Water—Dilutable Metalworking Fluids
SCOPE
1.1 This test method covers evaluation of the ferrous corrosion control characteristics of water-dilutable metalworking fluids.
1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
1.3 This standard does not purport to address all of the safety problems, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
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An American National Standard
Designation:D4627–92 (Reapproved 2002)
Standard Test Method for
Iron Chip Corrosion for Water–Dilutable Metalworking
Fluids
This standard is issued under the fixed designation D 4627; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope 4.3 Glass Stirring Rod.
4.4 Spatula.
1.1 This test method covers evaluation of the ferrous cor-
4.5 Pipettes, 5 mL.
rosion control characteristics of water–dilutable metalworking
4.6 Glass Bottle, 4-oz. with cap.
fluids.
4.7 Balance, accurate to one mg.
1.2 The values stated in SI units are to be regarded as the
4.8 Graduated Cylinder,50mL.
standard. The values given in parentheses are for information
4.9 Volumetric Flask,1L.
only.
4.10 Forceps.
1.3 This standard does not purport to address all of the
4.11 U.S.StandardSieve,18mesh(1.0mmsieveopenings),
safety concerns, if any, associated with its use. It is the
stainless steel.
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica-
5. Reagents and Materials
bility of regulatory limitations prior to use.
5.1 Gray Cast Iron Drilling Chips.
2. Summary of Test Method
NOTE 1—The chips are made from Class 30 gray cast iron, as cast. The
2.1 Cast iron chips are placed in a petri dish containing a
structure is mostly pearlite with small amounts of ferrite and type A
graphite. Brinell hardness is 179–217. The chips are made using a clean,
filter paper and diluted metalworking fluid.The dish is covered
oil free jobbers length high speed drill of 29/64 in. diameter with 118°
and allowed to stand overnight.The amount of rust stain on the
plain point, 29° helix and 12–15° clearance. Rotational speed should be
filterpaperisanindicationofthecorrosioncontrolprovidedby
500 rpm at a feed rate of 0.015 in./rev. Hand feeding is not permissible.
the fluid.
The chips are sieved on 5 and 18-mesh sieves and those retained on the
18-mesh sieve are immediately stored in airtight pint glass bottles. Each
3. Significance and Use
drilling is given a batch number. The bottle labels bear this batch number
3.1 The results obtained by this test are a useful guideline in and the date of filling.
determining the ability of water diluted metalworking fluids to
5.2 Synthetic Hard Water, 20,000 mg/L stock solution
prevent or minimize rust under specific conditions. There is
prepared by dissolving 29.4 g reagent grade (ACS standard)
usually a relationship between the results of this test and a
CaCl ·2H Oin1Loffreshlyboileddistilledwater.Amoderate
2 2
similar ability of the subject coolant to prevent rust on nested
hardness water is necessary in this test (100 ppm as CaCO ,71
parts or in drilled holes containing chips, etc. It must be
mg/L as chloride), and can be prepared at the time of the test
understood,however,thatconditions,metaltypes,etc.foundin
by diluting the stock hard water 0.5 % in distilled water.
practice will not correlate quantitatively with these controlled
5.3 Metalworking Fluid of Interest.
laboratory conditions. The procedure may not be able to
differentiate between two products with poor rust control due
6. Preparation of Diluted Metalworking Fluid
to the wide spacing between test dilutions.
6.1 Prepare 50 mL of fluid at each desired concentration by
weight%inthe100mg/Lhardnesswaterdescribedabove.The
4. Apparatus
water must be at room temperature as described in 7.1.Always
4.1 Disposable Petri Dishes, 35 by 10 mm plastic, with lids
add the metalworking fluid concentrates into the water.
No. 8-757-100A.
6.2 The dilutions tested will be in weight % as follows:
4.2 Glass-Fiber Filter Paper, Whatman No. 934-AH,
0.5, 1, 1.5, 2, 2.5, 3, 4, 5, 7 and 10 %
3.2-cm diameter.
1 2
This test method is under the jurisdiction of ASTM Committee D02 on The sole source of supply of the drilling chips known to the committee at this
Petroleum Products and Lubricants and is the direct responsibility of Subcommittee time is Techsolve, Technical Center, 1111 Edison Drive, Cincinnati, OH 45216-
D02.L0 on Industrial Lubricants. 2265. If you are aware of alternative suppliers, please provide this information to
Current edition approved Nov. 10, 2002. Published March 2003. Originally ASTM International Headquarters. Your comments will receive careful consider-
approved in 1986. Last previous edition approved in 1997 as D 4627–92 (1997). ation at a meeting of the responsible technical committee , which you may attend.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
D4627–92 (2002)
TABLE 1 Replicate Results
REPLICATE RESULTS________
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