GB/T 31586.2-2015 English PDF (GB/T31586.2-2015)

GB/T 31586.2-2015: Corrosion protection of steel structures by protective paint systems -- Assessment of, and acceptance criteria for, the adhesion/cohesion (fracture strength) of a coating -- Part 2: Cress-cut testing and X-cut testing
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GB/T 31586.2-2015
GB
NATIONAL STANDARD OF
THE PEOPLE’S REPUBLIC OF CHINA
ICS 87.040
G 50
GB/T 31586.2-2015 / ISO 16276-2.2007
Corrosion protection of steel structures by protective
paint systems - Assessment of, and acceptance criteria
for, the adhesion / cohesion (fracture strength) of a
coating - Part 2. Cross-cut testing and X-cut testing
(ISO 16276-2.2007, IDT)
ISSUED ON. JULY 3, 2015
IMPLEMENTED ON. FEBRUARY 1, 2016
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine;
Standardization Administration Committee.
Table of Contents
Foreword ... 3 
1 Scope ... 4 
2 Normative references ... 4 
3 Terms and definitions ... 5 
4 Principle... 6 
5 Apparatus and materials ... 7 
6 Procedure ... 7 
7 Expression of results ... 11 
8 Acceptance criteria ... 11 
9 Test report ... 11 
Annex A ... 13 
Bibliography ... 14 
Foreword
GB/T 31586 Corrosion protection of steel structures by protective paint systems
- Assessment of, and acceptance criteria for, the adhesion/cohesion (fracture
strength) of a coating consists of the following two parts.
- Part 1. Pull-off testing;
- Part 2. Cross-cut testing and X-cut testing.
This Part is the second part of GB/T 31586.
This Part was drafted in accordance with the rules given in GB/T 1.1-2009.
This Part uses translation method and identically adopts ISO 16276-2.2007
Corrosion protection of steel structures by protective paint systems -
Assessment of, and acceptance criteria for, the adhesion/cohesion (fracture
strength) of a coating - Part 2. Cross-cut testing and X-cut testing.
The Chinese documents which have consistency with the international
normative reference in this Part are as follows.
- GB/T 30790.7-2014 Paints and varnishes - Corrosion protection of steel
structures by protective paint systems - Part 7. Execution and supervision
of paint work (ISO 12944-7.1998, MOD)
- GB/T 30790.8-2014 Paints and varnishes - Corrosion protection of steel
structures by protective paint systems - Part 8. Development of
specification for new work and maintenance (ISO 12944-8.1998, MOD)
This Part was proposed by China Petroleum and Chemical Industry Federation.
This Part shall be under the jurisdiction of National Technical Committee on
Paints and Pigments of Standardization Administration of China (SAC/TC 5).
The drafting organizations of this Part. CNOOC Changzhou Paint and
Chemicals Research Institute Co., Ltd., Guangzhou Synthetic Material
Research Institute Co., Ltd., Nanjing Jinyuan Steel Coating Co., Ltd., AVIC
Bermuda New Material Technology Engineering Co., Ltd., Zhejiang Yutong New
Material Co., Ltd., Dongguan Daxing Chemical Co., Ltd..
Main drafters of this Part. Ji Junhong, Peng Jufang, Li Xin, Jin Weiping, Yang
Zhenbo, Liang Xinfang, Zhou Xiaofeng.
Corrosion protection of steel structures by protective
paint systems - Assessment of, and acceptance criteria
for, the adhesion / cohesion (fracture strength) of a
coating - Part 2. Cross-cut testing and X-cut testing
1 Scope
This Part of GB/T 31586 specifies procedures for rating the resistance of
coating systems when a cut in the form of a right-angle lattice pattern (cross-
cut) or in the form of an X (X-cut) is made into the coating, penetrating through
to the substrate.
This Part is only applicable if the cross-cut or X-cut test method is specified,
together with the rating from the appropriate rating scale.
NOTE The characteristics of the coating can make the assessment of the result of a
cross-cut or X-cut test difficult.
This Part also specifies suitable equipment and defines inspection areas,
sampling plans and acceptance/rejection criteria.
This Part does not specify ratings for particular coating systems.
2 Normative references
The following referenced documents are indispensable for the application of
this document. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any
amendments) applies.
ISO 2409.2006 Paints and varnishes - Cross-cut test
ISO 12944-7 Paints and varnishes - Corrosion protection of steel structures
by protective paint systems - Part 7. Execution and supervision of paint work
ISO 12944-8 Paints and varnishes - Corrosion protection of steel structures
by protective paint systems - Part 8. Development of specifications for new
work and maintenance
ISO 19840 Paints and varnishes - Corrosion protection of steel structures
GB/T 31586.2-2015
GB
NATIONAL STANDARD OF
THE PEOPLE’S REPUBLIC OF CHINA
ICS 87.040
G 50
GB/T 31586.2-2015 / ISO 16276-2.2007
Corrosion protection of steel structures by protective
paint systems - Assessment of, and acceptance criteria
for, the adhesion / cohesion (fracture strength) of a
coating - Part 2. Cross-cut testing and X-cut testing
(ISO 16276-2.2007, IDT)
ISSUED ON. JULY 3, 2015
IMPLEMENTED ON. FEBRUARY 1, 2016
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine;
Standardization Administration Committee.
Table of Contents
Foreword ... 3 
1 Scope ... 4 
2 Normative references ... 4 
3 Terms and definitions ... 5 
4 Principle... 6 
5 Apparatus and materials ... 7 
6 Procedure ... 7 
7 Expression of results ... 11 
8 Acceptance criteria ... 11 
9 Test report ... 11 
Annex A ... 13 
Bibliography ... 14 
Foreword
GB/T 31586 Corrosion protection of steel structures by protective paint systems
- Assessment of, and acceptance criteria for, the adhesion/cohesion (fracture
strength) of a coating consists of the following two parts.
- Part 1. Pull-off testing;
- Part 2. Cross-cut testing and X-cut testing.
This Part is the second part of GB/T 31586.
This Part was drafted in accordance with the rules given in GB/T 1.1-2009.
This Part uses translation method and identically adopts ISO 16276-2.2007
Corrosion protection of steel structures by protective paint systems -
Assessment of, and acceptance criteria for, the adhesion/cohesion (fracture
strength) of a coating - Part 2. Cross-cut testing and X-cut testing.
The Chinese documents which have consistency with the international
normative reference in this Part are as follows.
- GB/T 30790.7-2014 Paints and varnishes - Corrosion protection of steel
structures by protective paint systems - Part 7. Execution and supervision
of paint work (ISO 12944-7.1998, MOD)
- GB/T 30790.8-2014 Paints and varnishes - Corrosion protection of steel
structures by protective paint systems - Part 8. Development of
specification for new work and maintenance (ISO 12944-8.1998, MOD)
This Part was proposed by China Petroleum and Chemical Industry Federation.
This Part shall be under the jurisdiction of National Technical Committee on
Paints and Pigments of Standardization Administration of China (SAC/TC 5).
The drafting organizations of this Part. CNOOC Changzhou Paint and
Chemicals Research Institute Co., Ltd., Guangzhou Synthetic Material
Research Institute Co., Ltd., Nanjing Jinyuan Steel Coating Co., Ltd., AVIC
Bermuda New Material Technology Engineering Co., Ltd., Zhejiang Yutong New
Material Co., Ltd., Dongguan Daxing Chemical Co., Ltd..
Main drafters of this Part. Ji Junhong, Peng Jufang, Li Xin, Jin Weiping, Yang
Zhenbo, Liang Xinfang, Zhou Xiaofeng.
Corrosion protection of steel structures by protective
paint systems - Assessment of, and acceptance criteria
for, the adhesion / cohesion (fracture strength) of a
coating - Part 2. Cross-cut testing and X-cut testing
1 Scope
This Part of GB/T 31586 specifies procedures for rating the resistance of
coating systems when a cut in the form of a right-angle lattice pattern (cross-
cut) or in the form of an X (X-cut) is made into the coating, penetrating through
to the substrate.
This Part is only applicable if the cross-cut or X-cut test method is specified,
together with the rating from the appropriate rating scale.
NOTE The characteristics of the coating can make the assessment of the result of a
cross-cut or X-cut test difficult.
This Part also specifies suitable equipment and defines inspection areas,
sampling plans and acceptance/rejection criteria.
This Part does not specify ratings for particular coating systems.
2 Normative references
The following referenced documents are indispensable for the application of
this document. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any
amendments) applies.
ISO 2409.2006 Paints and varnishes - Cross-cut test
ISO 12944-7 Paints and varnishes - Corrosion protection of steel structures
by protective paint systems - Part 7. Execution and supervision of paint work
ISO 12944-8 Paints and varnishes - Corrosion protection of steel structures
by protective paint systems - Part 8. Development of specifications for new
work and maintenance
ISO 19840 Paints and varnishes - Corrosion protection of steel structures