ASTM D6237 : 24

Standard Guide for Painting Inspectors (Concrete and Masonry Substrates)

Standard Details

1.1 This guide is intended as an information aid to painting inspectors in carrying out their tasks correctly and efficiently. It includes the key elements of surface preparation, coatings application, and final approval for both field and shop work. The items should be selected that are pertinent to a specific project.

Note 1: For additional helpful information, refer to the following documents:

Manual of Concrete Practice ACI 515R American Concrete Institute2

Manual of Coating Work for Light Water Nuclear Power Plant Primary Containment and Other Safety Related Facilities3

Steel Structures Painting Manual Vol. 1 - Good Painting Practices4

Steel Structures Painting Manual Vol. 2 - Systems and Specifications4

Manufacturers Specifications and Instructions (made available to the inspector for reference to special requirements for proper application)

Safety Data Sheets (needed to ensure that personnel take necessary precautions in handling hazardous materials). Available from Materials manufacturer.

1.2 Certain industries or owners may require certified inspection personnel. See Guide D4537 for establishing procedures to certify inspectors for coating work in nuclear facilities. AMPP offers a training and certification program for concrete coating inspection.4

1.3 In certain cases the inspector may be required to assess the condition of the concrete substrate. SSPC has published an illustrated guide for performing a concrete condition assessment.4

1.4 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.

1.5 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.

1.6 This guide is arranged in the following order:

		Section
Referenced Documents		2
	ASTM StandardDetails	2.1
	OSHA StandardDetails	2.2
	ICRI StandardDetails	2.3
	SSPC StandardDetails	2.4
Significance and Use		3
Preparation for Inspection		4
Surface Preparation Methods and Requirements		5
	Surface Preparation	5.1
	Factors Affecting Coating Performance	5.2
	Surface Condition	5.2.1
	Cleanliness	5.2.2
	Moisture	5.2.3
	Surface Preparation Procedures	5.3
	Dry Surface Cleaning	5.3.1
	Water and Steam Cleaning	5.3.2
	Mechanical Tool Cleaning	5.3.3
	Hand Tool Cleaning	5.3.3.1
	Power Tool Cleaning	5.3.3.2
	Scarifying Machines	5.3.3.3
	Pre- and Post-Surface Preparation	5.3.3.4
	Finished Surface	5.3.3.5
	Blast Cleaning	5.3.4
	Water Blast Cleaning	5.3.5
	Acid Etching	5.3.6
Precautions in Preparing Unpainted and
	Previously Painted Surfaces	5.4
Inspection of Surfaces Prior to Field Painting		5.5
	New Construction	5.5.1
	Maintenance Repainting	5.5.2
Cracks and Voids		6
	Cracks	6.1
	Cracks in Concrete	6.1.1
	Joints in Concrete	6.1.2
	Voids	6.2
	Recoat Intervals	6.3
Coating Storage and Handling		7
	Storage of Coating and Thinner	7.1
	Mixing of Coatings	7.2
	Thinning	7.3
	Thinning of Coating	7.3.1
	Heating of Coating	7.4
Ambient Condition Considerations		8
	Drying	8.1
	Low Temperature	8.2
	High Temperature	8.3
	Moisture	8.4
	Wind	8.5
Coating Application		9
	Residual Contaminants	9.1
	Quality Assurance	9.2
	Film Defects	9.2.1
	Brush Application	9.3
	Spray Application	9.4
	Roller Application	9.5
	Miscellaneous Methods	9.6
	Rate of Application	9.7
	Additional Considerations	10
	Ventilation	10.1
	Painting Schedule	10.2
	Film Integrity	10.3
	Recoat Time	10.4
	Coating System Failure	10.5
Inspection Equipment		11
	General	11.1
	Adhesion of Existing Coating	11.1.1
	Portable Pull-Off Adhesion	11.1.2
	Field Inspection Equipment	11.2
	Drying and Curing Times	11.2.1
	Thermometers	11.2.1.1
	Psychrometric Charts	11.2.1.2
	Wet-Film Thickness Gauges	11.2.2
	Notched Gage	11.2.2.1
	Dry-Film Thickness Gauges	11.2.3
	Destructive Thickness Gauge	11.2.3.1
	Nondestructive Film Thickness Gauges	11.2.3.2
	Discontinuity (Holiday) Tester	11.3
Inspection Checklist		Appendix X1

1.7 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International StandardDetails, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.