PD 6484:1979
Current
The latest, up-to-date edition.
Hardcopy , PDF
English
30-03-1979
Foreword
Cooperating organizations
Section one. General
1 Scope
2 Conditions affecting corrosion at bimetallic
contacts
3 Prevention of bimetallic corrosion
Section two. Tables
4 Tabulated data on the behaviour of bimetallic
couples
Tables
1 Additional corrosion of aluminium and aluminium
alloys resulting from contact with other metals or
carbon
2 Additional corrosion of aluminium bronzes and
silicon bronzes resulting from contact with other
metals or carbon
3 Additional corrosion of brasses including high
tensile (HT) brasses (manganese bronze) resulting
from contact with other metals or carbon
4 Additional corrosion of cadmium resulting from
contact with other metals or carbon
5 Additional corrosion of cast irons resulting from
contact with other other metals or carbon
6 Additional corrosion of cast iron (austenitic)
resulting from contact with other metals or carbon
7 Additional corrosion of chromium resulting from
contact with other metals or carbon
8 Additional corrosion of copper resulting from
contact with other metals or carbon
9 Additional corrosion of cupro-nickels resulting from
contact with other metals or carbon
10 Additional corrosion of gunmetals, phosphor bronzes
and tin bronzes resulting from contact with other
metals or carbon
11 Additional corrosion of lead resulting from contact
with other metals or carbon
12 Additional corrosion of magnesium and magnesium
alloys resulting from contact with other metals or
carbon
13 Additional corrosion of nickel resulting from
contact with other metals or carbon
14 Additional corrosion of nickel-copper alloys
resulting from contact with other metals or carbon
15 Additional corrosion of nickel-chromium-iron alloys
resulting from contact with other metals or carbon
16 Additional corrosion of nickel-chromium-molybdenum
alloys resulting from contact with other metals or
carbon
17 Additional corrosion of nickel silvers resulting
from contact with other metals or carbon
18 Additional corrosion of soft solders resulting from
contact with other metals or carbon
19 Additional corrosion of stainless steel (austenitic,
with approximately 18% chromium) resulting from
contact with other metals or carbon
20 Additional corrosion of stainless steel
(martensitic, with approximately 13% chromium)
resulting from contact with other metals or carbon
21 Additional corrosion of steels (carbon and low
alloy) resulting from contact with other metals or
carbon
22 Additional corrosion of tin resulting from contact
with other metals or carbon
23 Additional corrosion of zinc and zinc base alloys
resulting from contact with other metals or carbon
Guidance on the avoidance of situations in which corrosion may arise from bimetallic contacts between different metals and alloys. Discusses the environmental conditions which may lead to such corrosion and gives advice on its alleviation. Annotated tables give the likely behaviour of various couples in five different environments.
This document gives guidance to designers, to help them to avoid situations in which corrosion may arise from the interaction of different metals and alloys at bimetallic contacts.
It comprises two sections. Section 1 gives details of conditions affecting corrosion at bimetallic contacts and methods of alleviating it, and section 2 consists of annotated tables indicating the degree of additional corrosion likely to occur at bimetallic contacts exposed to atmospheric and aqueous environments.
The document does not deal with other environments, such as those encountered in chemical engineering, where the effects may be different, and it does not refer to situations where contact between certain metals, even below their melting point, may lead to some interpenetration and consequential embrittlement.
The metals and alloys are identified in the tables by their generally accepted descriptions, but it will be appreciated that many variations in composition and condition are found in practice. For further information on the behaviour of particular alloys, reference should be made to the appropriate development association, trade association, manufacturer or supplier. In the case of defence stores, further information may be obtained from the appropriate branch of the Ministry of Defence.
| Committee |
ISENFE/8
|
| DevelopmentNote |
Supersedes 69/4244 DC. (08/2005) Reviewed and confirmed by BSI, December 2011. (11/2011)
|
| DocumentType |
Standard
|
| Pages |
34
|
| PublisherName |
British Standards Institution
|
| Status |
Current
|
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