BS 7773:1995 Code of practice for cleaning and preparation of metal surfaces
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This British Standard gives recommendations for
processes for the cleaning of metal surfaces to
remove any extraneous or undesirable materials or
deposits at any stage of manufacture. Such
cleaning processes are also suitable for cleaning
prior to adhesive bonding (see also
BS 5350: Part A1: 1976), brazing and
non-destructive testing. Appropriate stress relieving
treatments are also included.
NOTE 1. While some of the methods given might be applicable
to the preparation of surfaces before welding, the
recommendations regarding stress relief in annex A do not
apply to parts which are to be welded.
NOTE 2. Specific advice should be sought from the purchaser
about the treatment of individual products and materials
including the for stress relieving heat treatment, and
particularly where the shape, quantity and size will influence
the choice of procedures to be adopted.
NOTE 3. For practices applicable to high strength steel bolts
special concern is given to minimizing or eliminating the risk of
embrittlement. Relevant requirements are stated in BS 7371:
Part 1.
This British Standard also covers the processes
which are necessary for preparing metals prior to
the application of the following surface coatings:
a) electrodeposited metal coatings;
b) autocatalytic metal coatings (sometimes
referred to as electroless);
c) conversion coatings;
d) anodic oxidation coatings;
e) hot dipped coatings;
f) sprayed metal coatings;
g) diffusion coatings;
h) vitreous and porcelain enamel coatings;
i) ceramic coatings,
soob banne
j) vacuum deposited coatings;
k) impacted metal coatings.
NOTE 4. This British Standard does not cover in detail the
cleaning and preparation of metal surfaces prior to painting
although some general recommendations are given where
appropriate.
Section 3 of this standard describes methods for
the following treatments:
1) degreasing;
2) descaling;
3) pickling;
4) etching,
5) derusting;
6) chemical smoothing;
7) chemical polishing,
8) electrobrightening;
9) electropolishing;
10) fluoride anodizing process for cleaning magnesium alloys.
Primary Item Type:
British Standard
Identifiers:
ISBN 0580233901
Language:
English
Subject Keywords:
Metal surface; Electrodeposited metal coatings; Autocatalytic metal coatings (sometimes referred to as electroless); Conversion coatings; Anodic oxidation coatings; Hot dipped coatings; Sprayed metal coatings; Diffusion coatings; Vitreous and porcelain enamel coatings; Ceramic coatings; Soob banne; Vacuum deposited coatings; Impacted metal coatings
