GB/T 8753.4-2005: Anodizing of aluminium and aluminium alloys -- Assessment of quality of sealed anodic oxide coatings -- Part 4: Dye spot test with prior acid treatment

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Scope

This part specifies the method for assessing the quality of sealed anodic
oxidation coatings, by the anti-dying adsorption ability, after acid treatment.
This part is applicable to the production control inspection of anodic oxidation
coating, with anti-pollution ability, which is subject to atmospheric sun-exposure
or corrosive environment.
This part does not apply to the anodic oxidation coating, which is produced by
the following aluminum alloys:
a) Anodic oxidation coating, which has a copper content > 2% AND silicon
content > 4%;
b) Oxidation coating which is sealed by potassium dichromate;
c) Oxidation coating which is treated by oiling, waxing, painting;
d) Dark oxidation coating;
e) Oxidation coating, which has a thickness of less than 3 µm.
When the sealing solution contains nickel, cobalt or other organic additives, this
method is not effective enough.

Basic Data

Standard ID	GB/T 8753.4-2005 (GB/T8753.4-2005)
Description (Translated English)	Anodizing of aluminium and aluminium alloys. Assessment of quality of sealed anodic oxide coatings. Part 4: Dye spot test with prior acid treatment
Sector / Industry	National Standard (Recommended)
Classification of Chinese Standard	H21
Classification of International Standard	25.220.20
Word Count Estimation	6,632
Date of Issue	2005-07-04
Date of Implementation	2005-12-01
Older Standard (superseded by this standard)	GB/T 8753-1988
Adopted Standard	ISO 2143-1981; MOD
Regulation (derived from)	Announcement of Newly Approved National Standards No. 10 of 2005 (No. 84 overall)
Issuing agency(ies)	General Administration of Quality Supervision, Inspection and Quarantine of the People Republic of China, China National Standardization Administration Committee
Summary	This standard specifies: after treatment with acid anti-stain adsorption capacity to assess quality of sealed anodic oxidation coatings methods. This standard applies to: Use at atmospheric exposure or corrosive environments with anti-pollution anodized film production control test.