GB/T 30789.4-2015 Active National standards

GB/T 30789.4-2015 Paints and varnishes—Evaluation of degradation of coatings—Designation of quantity and size of defects,and of intensity of uniform changes in appearance—Part 4:Assessment of degree of cracking

GB/T 30789.4-2015 Paints and varnishes—Evaluation of degradation of coatings—Designation of quantity and size of defects,and of intensity of uniform changes in appearance—Part 4:Assessment of degree of cracking

Publish Date: 2015-07-03 Implement Date: 2016-02-01 For services related to genuine standard inquiry, procurement, translation, and other related services in China, please Contact Us

Basic Information

Standard Code: GB/T 30789.4-2015

Standard Type: National standards

Standard Status: Active

is_force_gb: no

CCS Name: Paints, pigments, and dyes

ICS Name: Paints and varnishes

Publish Date: 2015-07-03

Implement Date: 2016-02-01

Pages: 16 pages

Scope

This part of GB/T 30789 provides a method for assessing the cracking grade by comparing with the standard illustrations and using the definitions specified in GB/T 30789.1.
ISO 4628-1 defines a system for assessing the number and size of defects caused by coating aging, as well as the degree of uniform change in appearance, and outlines the general principles of the assessment system. This system is particularly suitable for defects and uniform changes caused by artificial accelerated aging and natural exposure, such as color changes, for example: yellowing.

Development Information

Word Count: 30 Thousand words Pages: 16 pages

Same series standard

GB/T 30789.1-2015 Paints and varnishes—Evaluation of degradation of coatings—Designation of quantity and size of defects ,and of intensity of uniform changes inappearance—Part 1:General introduction and designation system GB/T 30789.5-2015 Paints and varnishes—Evaluation of degradation of coatings—Designation of quantity and size of defects,and of intensity of uniform changes in appearance—Part 5:Assessment of degree of flaking GB/T 30789.6-2015 Paints and varnishes—Evaluation of degradation of coatings—Designation of quantity and size of defects,and of intensity of uniform changes in appearance—Part 6:Assessment of degree of chalking by tape method GB/T 30789.7-2015 Paints and varnishes—Evaluation of degradation of coatings—Designation of quantity and size of defects,and of intensity of uniform changes in appearance—Part 7:Assessment of degree of chalking by velvet method GB/T 30789.8-2015 Paints and varnishes—Evaluation of degradation of coatings—Designation of quantity and size of defects,and of intensity of uniform changes in appearance—Part 8:Assessment of degree of delamination and corrosion around a scribe or other artificial defect

Referenced Standards

ISO 4628-1

Adopt standards

ISO 4628-4:2003

Related Standards

GB 3186-1982 Replaced

GB 3186-1982 Sampling paint products

Publish Date: 1982-09-01

GB/T 4653-1984 Active

GB/T 4653-1984 The general technical specifications on infrared radiation paints

Publish Date: 1984-08-20

GB/T 5206.1-1985 Replaced

GB/T 5206.1-1985 Paints and varnishes—Vocabulary—Part 1:General terms

Publish Date: 1985-07-16

GB/T 5207-1985 Abolished

GB/T 5207-1985 Coatings—Determination of the danger classification by flash testing (rapid equilibrium method)

Publish Date: 1985-07-16

GB/T 5208-1985 Replaced

GB/T 5208-1985 Coatings—Flash point test—Rapid equilibrium method

Publish Date: 1985-07-16

GB/T 5209-1985 Active

GB/T 5209-1985 Paints and varnishes—Determination of resistance to water—Water immersion method

Publish Date: 1985-07-16