Standard No.:	GB 8923-1988
English Name:	Rust grades and Preparation Grades of Steel Surfaces before Applicati
Chinese Name:	涂装前钢材表面锈蚀等级和除锈等级
Chinese Classification:	U06    Vessel technology
Professional Classification:	GB    National Standard
ICS Classification:	25.220.20 25.220.20    Surface treatment 25.220.20
Issued by:	China State Bureau of Technology Supervision
Issued on:	1988-3-21
Implemented on:	1989-3-1
Status:	abolished
Superseded by:	GB/T 8923.1-2011 Preparation of steel substrates before application of paints and related products - Visual assessment of surface cleanliness - Part 1: Rust grades and preparation grades of uncoated s
Superseded on:	2012-10-1
Abolished on:	2012-10-01
Superseding:	CB* 3092-1981
Language:	English
File Format:	PDF
Word Count:	2000 words
Price(USD):	40.00
Delivery:	via email in 1 business day

This standard specifies visual means for detecting rust grades and preparation grade of steel surface before painting. It is applicable to hot-strip surface that has been de-rusting through blast rust cleaning, manual and power tool cleaning and flame cleaning. The standard may also service as reference for rust grades assessment of cold rolled steels.

This standard is equivalent to International Standard ISO 8501-1: 1988 "Steel Pretreatment before Application of Painting and Relevant Product -- Visual Assessment of Surface Clearness -- Part 1: Rust Grade of Un-Cleaned Steel And Preparation Grade of Steel That Has Been Completely Cleaned".

Contents
1. General provision
2. Rust Grades
3. Preparation Grades
3.1 General Principles
3.2 Blast Rust Cleaning Methods
3.3 Manual and Power Tools Rust Cleaning.
3.4 Flame Cleaning
4. Visual Assessment of Rust Grade and Preparation Grade of Steel Surface
5 Photos
Additional Explanation