ASTM D5162-01

Standard Practice for Discontinuity (Holiday) Testing of Nonconductive Protective Coating on Metallic Substrates

SCOPE
1.1 This practice covers procedures for determining discontinuities using two types of test equipment:
1.1.1 Test Method A--Low Voltage Wet Sponge, and
1.1.2 Test Method B--High Voltage Spark Testers.
1.2 This practice addresses metallic substrates. For concrete surfaces, refer to Practice D4787.
1.3 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses immediately following inch-pound units are for information only.
1.4 This standard does not purport to address all of the safety concerns, 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.

General Information

• Status: Historical
• Publication Date: 09-Jun-2001
• ICS: 25.220.20 - Surface treatment
• Technical Committee: D01 - Paint and Related Coatings, Materials, and Applications
• Drafting Committee: D01.46 - Industrial Protective Coatings

Relations

• Replaces: ASTM D5162-00 - Standard Practice for Discontinuity (Holiday) Testing of Nonconductive Protective Coating on Metallic Substrates
• Effective Date: 10-Jun-2001
• Replaced By: ASTM D5162-08 - Standard Practice for Discontinuity (Holiday) Testing of Nonconductive Protective Coating on Metallic Substrates
• Effective Date: 01-Jun-2008
• Referred By: ASTM D6577-15(2019) - Standard Guide for Testing Industrial Protective Coatings
• Effective Date: 10-Jun-2001
• Referred By: ASTM B1000-21 - Standard Practices for Casting Preparation and Test Procedure of Porcelain Enamel-lined Pipe, Fittings, and Valves for Use in the Municipal Wastewater, Sewage, and Water Treatment Industry
• Effective Date: 10-Jun-2001
• Referred By: ASTM D6137-97(2018) - Standard Test Method for Sulfuric Acid Resistance of Polymer Linings for Flue Gas Desulfurization Systems
• Effective Date: 10-Jun-2001
• Referred By: ASTM D4787-13(2018) - Standard Practice for Continuity Verification of Liquid or Sheet Linings Applied to Concrete Substrates
• Effective Date: 10-Jun-2001
• Referred By: ASTM D4538-21 - Standard Terminology Relating to Protective Coating and Lining Work for Power Generation Facilities
• Effective Date: 10-Jun-2001
• Referred By: ASTM D7602-11(2017) - Standard Practice for Installation of Vulcanized Rubber Linings
• Effective Date: 10-Jun-2001
• Referred By: ASTM D3276-21 - Standard Guide for Painting Inspectors (Metal Substrates)
• Effective Date: 10-Jun-2001
• Referred By: ASTM D6943-15(2019) - Standard Practice for Immersion Testing of Industrial Protective Coatings and Linings
• Effective Date: 10-Jun-2001
• Referred By: ASTM D5498-12a(2018) - Standard Guide for Developing a Training Program for Personnel Performing Coating and Lining Work Inspection for Nuclear Facilities
• Effective Date: 10-Jun-2001

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:D5162–01
Standard Practice for
Discontinuity (Holiday) Testing of Nonconductive Protective
1
Coating on Metallic Substrates
This standard is issued under the fixed designation D 5162; 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 3.1.4 pinhole, as used in this standard—a film defect
characterized by small porelike flaws in the coating which,
1.1 This practice covers procedures for determining discon-
when extended entirely through the film, will appear as a
tinuities using two types of test equipment:
discontinuity. A pinhole in the finish coat may not appear as a
1.1.1 Test Method A—Low Voltage Wet Sponge, and
discontinuity.
1.1.2 Test Method B—High Voltage Spark Testers.
1.2 This practice addresses metallic substrates. For concrete
4. Significance and Use
2
surfaces, refer to Practice D 4787.
4.1 A coating is applied to a metallic substrate to prevent
1.3 The values stated in inch-pound units are to be regarded
corrosion, reduce abrasion or reduce product contamination, or
as the standard. The values given in parentheses immediately
both. The degree of coating continuity required is dictated by
following inch-pound units are for information only.
service conditions. Discontinuities in a coating are frequently
1.4 This standard does not purport to address all of the
very minute and not readily visible. This practice provides a
safety concerns, if any, associated with its use. It is the
procedure for electrical detection of minute discontinuities in
responsibility of the user of this standard to establish appro-
nonconductive coating systems.
priate safety and health practices and determine the applica-
4.2 Electrical testing to determine the presence and number
bility of regulatory limitations prior to use.
of discontinuities in a coating film is performed on a noncon-
2. Referenced Documents ductive coating applied to a conductive surface. The allowable
number of discontinuities should be determined prior to
2.1 ASTM Standards:
conducting this test since the acceptable quantity of disconti-
D 4787 Practice for Continuity Verification of Liquid or
2
nuities will vary depending on coating film thickness, design,
Sheet Linings Applied to Concrete Substrates
and service conditions.
G 62 Test Methods for Holiday Detection in Pipeline Coat-
2 4.3 The low voltage wet sponge test equipment is generally
ings
used for determining the existence of discontinuities in coating
3. Terminology films having a total thickness of 20 mils (0.5 mm) or less. High
voltage spark test equipment is generally used for determining
3.1 Definitions of Terms Specific to This Standard:
the existences of discontinuities in coating films having a total
3.1.1 discontinuity, as used in this standard— a void, crack,
thickness of greater than 20 mils (0.5 mm).
thin spot, foreign inclusion, or contamination in the coating
4.4 Coatings that are applied at a thickness of less than 20
film that significantly lowers the dielectric strength of the
mils(0.5mm)maybesusceptibletodamageiftestedwithhigh
coating film. May also be identified as a holiday or pinhole.
voltage spark testing equipment. Consult the coating manufac-
3.1.2 holiday, as used in this standard—a term that identi-
turer for proper test equipment and inspection voltages.
fies a discontinuity.
4.5 To prevent damage to a coating film when using high
3.1.3 holiday detector, as used in this standard— a device
voltage test instrumentation, total film thickness and dielectric
that locates discontinuities in a nonconductive coating film
strengthinacoatingsystemshallbeconsideredinselectingthe
applied to a conductive surface.
appropriate voltage for detection of discontinuities. Atmo-
spheric conditions shall also be considered since the voltage
1
This practice is under the jurisdiction of ASTM Committee D33 on Protective
required for the spark to gap a given distance in air varies with
Coating and Lining Work for Power Generation Facilities and is the direct
the conductivity of the air at the time the test is conducted.
responsibility of Subcommittee D33.04 on Quality Systems and Inspection.
Suggested starting voltages are provided in Table 1.
Current edition approved June 10, 2001. Published August 2001. Originally
published as D 5162 – 91. Last previous edition D 5162 – 00.
2
Annual Book of ASTM Standards, Vol 06.02.
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D5162
TABLE 1 Suggested Voltages for High Voltage Spark Testing
5.1.3.1 Lightweight, Self
...