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ASTM D4752-98

(Test Method)

Standard Test Method for Measuring MEK Resistance of Ethyl Silicate (Inorganic) Zinc-Rich Primers by Solvent Rub

Standard Test Method for Measuring MEK Resistance of Ethyl Silicate (Inorganic) Zinc-Rich Primers by Solvent Rub

SCOPE
1.1 This test method describes a solvent rub technique for assessing the MEK resistance of ethyl silicate (inorganic) zinc-rich primers. The MEK resistance of some two-component ethyl silicate zinc-rich primers has been shown to correlate well with the cure of the primer as determined by diffuse reflectance infrared spectroscopy.  The technique can be used in the laboratory, field, or in the fabricating shop.  
1.2 This standard may involve hazardous materials, operations, and equipment. This standard does not purport to address all of the safety problems 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. Specific hazard statements are given in Section 6.

General Information

Status
Historical
Publication Date
09-May-1998
ICS
87.040 - Paints and varnishes
Technical Committee
D01 - Paint and Related Coatings, Materials, and Applications
Drafting Committee
D01.46 - Industrial Protective Coatings
Current Stage
Ref Project

Relations

Replaced By
ASTM D4752-03 - Standard Test Method for Measuring MEK Resistance of Ethyl Silicate (Inorganic) Zinc-Rich Primers by Solvent Rub
Effective Date
10-Jan-2003

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ASTM D4752-98 - Standard Test Method for Measuring MEK Resistance of Ethyl Silicate (Inorganic) Zinc-Rich Primers by Solvent RubASTM D4752-98 - Standard Test Method for Measuring MEK Resistance of Ethyl Silicate (Inorganic) Zinc-Rich Primers by Solvent Rub
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ASTM D4752-98 - Standard Test Method for Measuring MEK Resistance of Ethyl Silicate (Inorganic) Zinc-Rich Primers by Solvent Rub
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Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn. Contact
ASTM International (www.astm.org) for the latest information.
Designation: D 4752 – 98
AMERICAN SOCIETY FOR TESTING AND MATERIALS
100 Barr Harbor Dr., West Conshohocken, PA 19428
Reprinted from the Annual Book of ASTM Standards. Copyright ASTM
Standard Test Method for
Measuring MEK Resistance of Ethyl Silicate (Inorganic)
1
Zinc-Rich Primers by Solvent Rub
This standard is issued under the fixed designation D 4752; 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 3. Terminology
1.1 This test method describes a solvent rub technique for 3.1 Definitions of Terms Specific to This Standard:
assessing the MEK resistance of ethyl silicate (inorganic) 3.1.1 double rub—the act of rubbing a solvent saturated
zinc-rich primers. The MEK resistance of some two- cloth in one complete forward and backward motion over a
component ethyl silicate zinc-rich primers has been shown to coated surface.
correlate well with the cure of the primer as determined by
2 4. Significance and Use
diffuse reflectance infrared spectroscopy. The technique can
be used in the laboratory, field, or in the fabricating shop. 4.1 Ethyl silicate zinc-rich primers cure by the reaction of
the vehicle with moisture thereby providing a binder. As
Consult supplier’s Material Safety Data Sheet(s) for specific
hazard information relating to the solvent used. relative humidity and temperature vary during the day, so does
the rate of cure. A certain minimum degree of cure is necessary
1.2 The values stated in inch-pound units are to be regarded
as the standard. The values given in parentheses are for prior to topcoating. It has been shown that the degree of cure
of ethyl silicate zinc-rich primers can be measured by the
information only.
1.3 This standard does not purport to address all of the chemical changes occurring using diffuse reflectance infrared
2
spectroscopy. This solvent rub test has been shown to corre-
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro- late well with the infrared spectroscopic results of some
two-component ethyl silicate inorganic zinc systems.
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use. Specific hazard 4.2 The cure rating required for the application of specific
topcoats must be agreed upon before the test method is used.
statements are given in Section 6.
2. Referenced Documents 5. Reagents and Materials
5.1 Methyl Ethyl Ketone (MEK), in accordance with Speci-
2.1 ASTM Standards:
3
D 740 Specification for Methyl Ethyl Ketone fication D 740.
5.2 Cheesecloth, 100 % cotton mesh size grade 28 by 24
D 1186 Test Methods for Nondestructive Measurement of
Dry Film Thickness of Nonmagnetic Coatings Applied to approximately 12- by 12-in. (300- by 300-mm) and contrasting
4
in color to the coating being evaluated, or other mutually
a Ferrous Base
agreed upon cloth.
D 1400 Test Method for Nondestructive Measurement of
Dry Film Thickness of Nonconductive Coatings Applied to 5.3 Squeeze Bottle.
4
5.4 Proper Safety Equipment, as determined from the sol-
a Nonferrous Metal Base
D 4138 Test Method for Measurement of Dry Film Thick- vent MSDS, for example, solvent resistant gloves, respirator.
5
ness of Protective Coating Systems by Destructive Means
6. Procedure
6.1 Select areas on the primer surface at least 6 in. (150 mm)
1 long on which to run the tests. Clean the surface with tap water
This test method is under the jurisdiction of ASTM Committee D-1 on Paint
and Related Coatings, Materials, and Applications and is the direct responsibility of or dry cloth to remove loose material.
Subcommittee D01.46 on Industrial Protective Coatings.
NOTE 1—Tap water may influence the cure of the zinc-rich primer.
Current edition approved May 10, 1998. Published August 1998. Originally
published as D 4752 – 87. Last previous edition D 4752 – 95.
6.2 Measure the dry film thickness of the primer in the
2
Starr, T. L., Henton, L. E., Lewis, W. S., and Rideout, F. A., “Improved Field
selected areas in accordance with Test Methods D 1186,
Reliability of High Performance Coating Systems: Phase II—Develop Procedures
and Criteria in Critical Performance Areas,” available from Steel Structures Painting D 1400 or D 4138. Mark a 6- by 1-in. (150- by 25-mm)
Council, 4516 Henry St., Suite 301, Pittsburgh, PA 15213.
rectangular test area on the undamaged cleaned surface using a
3
Annual Book of ASTM Standards, Vol 06.04.
pencil or other suitable solvent resistant marker.
4
Annual Book of ASTM Standards, Vol 06.01.
5
6.3 Fold the cheesecloth into a pad of double thickness and
Annual Book
...

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