GB/T 31586.1-2015: Corrosion protection of steel structures by protective paint systems -- Assessment of, and acceptance criteria for, the adhesion/cohesion (fracture strength) of a coating -- Part 1: Pull-off testing

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Scope

This Part of GB/T 31586 specifies procedures for assessing the fracture
strength of a protective paint coating of any thickness on a steel substrate of
thickness not less than 10 mm. The procedures given in this Part of GB/T 31586
are based on methods used with different types of pull-off test equipment. The
results obtained using such different types of equipment are not comparable.
NOTE 1 Substrates of less than 10 mm in thickness can be tested if they are
strengthened by the sandwich technique (see ISO 4624) or by the nature of the structure
(e.g. I-beam or backing-plate). Otherwise, test panels with a thickness of at least 10 mm
coated in the same way as the structure can be used, or the method specified GB/T
31586.2 can be used.
This Part is only applicable if a fracture strength value is specified, together with the type
of test equipment and the manufacturer of the equipment. Usually, this information is
included in contract documentation.
NOTE 2 A value for the fracture strength is only meaningful if the requirements
concerning the ambient conditions (see 6.4.2) are met.
This Part also specifies suitable equipment and defines inspection areas,
sampling plans and acceptance/rejection criteria.
It does not give any values of the fracture strength of different protective paint
coatings.

Basic Data

Standard ID	GB/T 31586.1-2015 (GB/T31586.1-2015)
Description (Translated English)	Corrosion protection of steel structures by protective paint systems -- Assessment of, and acceptance criteria for, the adhesion/cohesion (fracture strength) of a coating -- Part 1: Pull-off testing
Sector / Industry	National Standard (Recommended)
Classification of Chinese Standard	G50
Classification of International Standard	87.040
Word Count Estimation	12,148
Date of Issue	2015-06-02
Date of Implementation	2016-01-01
Quoted Standard	ISO 4624; ISO 12944-7; ISO 12944-8; ISO 19840
Adopted Standard	ISO 16276-1-2007, IDT
Regulation (derived from)	National Standard Announcement 2015 No.19
Issuing agency(ies)	General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Summary	This Standard specifies the method for assessing protective paint coating thickness not less than 10 mm in any thickness of steel substrates pull strength. Step standard given is based on using different types of pull-off test equipment, the test results obtained by these different types of equipment are not comparable. This Standard has been prescribed only in the coating test device type and device manufacturers use a breach of intensity values ??only apply. Typically, this information should be included in the contract documents. This Standard also specifies the applicable devices, define the inspection area, the sampling plan and accept/reject criteria. This Standard does not give different protective paint coatings any pull strength values.