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EN 2101:1991

Current

Current

The latest, up-to-date edition.

Aerospace series - Chromic acid anodizing of aluminium and wrought aluminium alloys

Published date

17-07-1991

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Foreword
1 Scope and field of application
2 Purpose of anodizing
3 References
4 Material categories
5 Supporting jig
6 Processing sequence
7 Quality assurance
8 Designation
Annex A - Surface preparation recommendations
Annex B - Inspection of the absorbing ability by
          anthraquinone violet drop test
Annex C - Inspection of corrosion resistance by repeated
          immersion test in salt solution

This standard specifies the required characteristics for the performance of chromic acid anodizing with or without sealing as well as quality assurance of the coating obtained. It applies to parts in aluminium and wrought aluminium alloys of categroy 1 and 2 (see clause 4) used in aerospace construction when reference is made to this standard.

Committee
ASD-STAN
DevelopmentNote
Supersedes PREN 2101. (11/2003)
DocumentType
Standard
PublisherName
Comite Europeen de Normalisation
Status
Current
Supersedes

Standards Relationship
NBN EN 2912 : 1996 Identical
I.S. EN 2101:1992 Identical
PN EN 2101 : 1997 Identical
BS EN 2101:1991 Identical
NEN EN 2101 : 1992 Identical
DIN EN 2101:1991-08 Identical
SNV DIN EN 2101 : 1991 Identical
NS EN 2101 : 1ED 1991 Identical
NBN EN 2101 : 1992 Identical
NF EN 2101 : 1992 Identical
UNI EN 2101 : 1991 Identical
UNE-EN 2101:1994 Identical

96/702225 DC : 0 PREN 4228 - AEROSPACE SERIES - PIPE COUPLINGS 60 DEGREES; IN ANODIZED ALUMINIUM ALLOYS; SLEEVES BRAZING
17/30371343 DC : 0 BS EN 4688 - AEROSPACE SERIES - PAINTS AND VARNISHES - CORROSION RESISTANT CHROMATED TWO COMPONENT COLD CURING EPOXY PRIMER - HIGH CORROSION RESISTANCE FOR MILITARY APPLICATION
14/30314143 DC : 0 BS EN 2285 - AEROSPACE SERIES - BUSHES, PLAIN ALUMINIUM ALLOY WITH SELF-LUBRICATING LINER - DIMENSIONS AND LOADS
06/30151472 DC : 0 BS EN 4534-2 - AEROSPACE SERIES - BUSHES, PLAIN IN ALUMINIUM ALLOY WITH SELF-LUBRICATING LINER, ELEVATED LOAD - PART 2: DIMENSIONS AND LOADS - INCH SERIES
96/702215 DC : 0 PREN 4146 - AEROSPACE SERIES - PIPE COUPLINGS 60 DEGREES; IN ANODIZED ALUMINIUM ALLOY; UNIONS, STRAIGHT BULKHEAD
BS EN 4704:2012 Aerospace series. Tartaric-Sulphuric-Acid anodizing of aluminium and aluminium wrought alloys for corrosion protection and paint pre-treatment (TSA)
14/30301152 DC : 0 BS EN 12392 - ALUMINIUM AND ALUMINIUM ALLOYS - WROUGHT PRODUCTS AND CAST PRODUCTS - SPECIAL REQUIREMENTS FOR PRODUCTS INTENDED FOR THE PRODUCTION OF PRESSURE EQUIPMENT
BS 4L 100:1993 Procedure for inspection, testing and acceptance of wrought aluminium and aluminium alloys
BS EN 4687:2012 Aerospace series. Paints and varnishes. Chromate free non corrosion inhibiting two components cold curing primer for military application
PREN 12392 : DRAFT 2014 ALUMINIUM AND ALUMINIUM ALLOYS - WROUGHT PRODUCTS AND CAST PRODUCTS - SPECIAL REQUIREMENTS FOR PRODUCTS INTENDED FOR THE PRODUCTION OF PRESSURE EQUIPMENT
PREN 2285 : 200P2 AEROSPACE SERIES - BUSHES, PLAIN ALUMINIUM ALLOY WITH SELF-LUBRICATING LINER - DIMENSIONS AND LOADS
NF EN 4660-004 : 2011 AEROSPACE SERIES - MODULAR AND OPEN AVIONICS ARCHITECTURES - PART 004: PACKAGING
PREN 3392 : 200P1 AEROSPACE SERIES - RIVETS, SOLID, UNIVERSAL HEAD, IN ALUMINIUM ALLOY 2117, ANODIZED OR CHROMATED, METRIC SERIES
PREN 2556 : 2 AEROSPACE SERIES - RIVETS, SOLID, 100 DEGREES COUNTERSUNK NORMAL HEAD, WITH DOME, IN ALUMINIUM ALLOY 5056A, ANODIZED OR CHROMATED INCH BASED SERIES
PREN 4689 : 200P1 AEROSPACE SERIES - PAINTS AND VARNISHES - TWO COMPONENTS COLD CURING POLYURETHANE FINISH - HIGH FLEXIBILITY AND CHEMICAL AGENT RESISTANCE FOR MILITARY APPLICATION
PREN 4534-2 : 200P2 AEROSPACE SERIES - BUSHES, PLAIN IN ALUMINIUM ALLOY WITH SELF-LUBRICATING LINER, ELEVATED LOAD - PART 2: DIMENSIONS AND LOADS - INCH SERIES
PREN 4827 : DRAFT 2015 AEROSPACE SERIES - HEXAVALENT CHROMIUM FREE ANODIZING OF ALUMINIUM AND ALUMINIUM ALLOYS
DIN EN 2149:1996-05 AEROSPACE SERIES - RIVETS, SOLID, UNIVERSAL HEAD, IN ALUMINIUM ALLOY 5056A, ANODISED OR CHROMATED, INCH BASED SERIES
DIN EN 2284:1991-08 AEROSPACE SERIES; SULPHURIC ACID ANODIZING OF ALUMINIUM AND WROUGHT ALUMINIUM ALLOYS
BS EN 2285:2017 Aerospace series. Bushes, plain, aluminium alloy, with self-lubricating liner. Dimensions and loads
BS EN 2552:1993 Rivets, solid, 100° normal countersunk head with dome, in aluminium alloy 2117, anodized or chromated, inch based series
BS EN 2284:1991 Specification for sulfuric acid anodizing of aluminium and wrought aluminium alloys
UNI EN 4689 : 2013 AEROSPACE SERIES - PAINTS AND VARNISHES - TWO COMPONENTS COLD CURING POLYURETHANE FINISH - HIGH FLEXIBILITY AND CHEMICAL AGENT RESISTANCE FOR MILITARY APPLICATION
EN 12392:2016 Aluminium and aluminium alloys - Wrought products and cast products - Special requirements for products intended for the production of pressure equipment
ISO 9738:2000 Aerospace — Turnbarrels, for aircraft control wire rope — Dimensions and loads
12/30271191 DC : 0 BS EN 4827 - AEROSPACE SERIES - HEXAVALENT CHROMIUM FREE ANODIZING OF ALUMINIUM AND ALUMINIUM ALLOYS
BS EN 4689:2012 Aerospace series. Paints and varnishes. Two components cold curing polyurethane finish. High flexibility and chemical agent resistance for military application
96/702226 DC : 0 PREN 4229 - AEROSPACE SERIES - PIPE COUPLINGS 60 DEGREES; IN ANODIZED ALUMINIUM ALLOY; UNIONS, STRAIGHT BRAZING
BS EN 4535-2:2009 Aerospace series. Bushes, flanged in aluminium alloy with self-lubricating liner, elevated load Dimensions and loads. Inch series
96/702211 DC : 0 PREN 4142 - AEROSPACE SERIES - PIPE COUPLINGS 60 DEGREES; IN ANODIZED ALUMINIUM ALLOY; UNIONS, TWO WAY
96/702214 DC : 0 PREN 4145 - AEROSPACE SERIES - PIPE COUPLINGS 60 DEGREES; IN ANODIZED ALUMINIUM ALLOY; NUTS, SWIVEL
PREN 2286 : 200P2 AEROSPACE SERIES - BUSHES, FLANGED ALUMINIUM ALLOY WITH SELF-LUBRICATING LINER - DIMENSIONS AND LOADS
PREN 4704 : 200P1 AEROSPACE SERIES - TARTARIC-SULPHURIC-ACID ANODIZING OF ALUMINIUM AND ALUMINIUM WROUGHT ALLOYS FOR CORROSION PROTECTION AND PAINT PRE-TREATMENT (TSA)
I.S. EN 4704:2012 AEROSPACE SERIES - TARTARIC-SULPHURIC-ACID ANODIZING OF ALUMINIUM AND ALUMINIUM WROUGHT ALLOYS FOR CORROSION PROTECTION AND PAINT PRE-TREATMENT (TSA)
I.S. EN 4687:2012 AEROSPACE SERIES - PAINTS AND VARNISHES - CHROMATE FREE NON CORROSION INHIBITING TWO COMPONENTS COLD CURING PRIMER FOR MILITARY APPLICATION
I.S. EN 4827:2017 AEROSPACE SERIES - HEXAVALENT CHROMIUM FREE ANODIZING OF ALUMINIUM AND ALUMINIUM ALLOYS
DIN EN 2552:1993-03 AEROSPACE SERIES - RIVETS, SOLID, 100 DEGREES NORMAL COUNTERSUNK HEAD WITH DOME, IN ALUMINIUM ALLOY 2117, ANODIZED OR CHROMATED, INCH BASED SERIES
DIN EN 2122:1996-03 AEROSPACE SERIES - WASHERS, FLAT, IN ALUMINIUM ALLOY, ANODIZED OR CHROMATED
UNI EN 4688 : 2013 AEROSPACE SERIES - PAINTS AND VARNISHES - CORROSION INHIBITING TWO COMPONENTS COLD CURING PRIMER FOR MILITARY APPLICATION
UNI EN 4687 : 2013 AEROSPACE SERIES - PAINTS AND VARNISHES - CHROMATE FREE NON CORROSION INHIBITING TWO COMPONENTS COLD CURING PRIMER FOR MILITARY APPLICATION
EN 4689:2012 Aerospace series - Paints and varnishes - Two components cold curing polyurethane finish - High flexibility and chemical agent resistance for military application
I.S. EN 12392:2016 ALUMINIUM AND ALUMINIUM ALLOYS - WROUGHT PRODUCTS AND CAST PRODUCTS - SPECIAL REQUIREMENTS FOR PRODUCTS INTENDED FOR THE PRODUCTION OF PRESSURE EQUIPMENT
EN 4687:2012 Aerospace series - Paints and varnishes - Chromate free non corrosion inhibiting two components cold curing primer for military application
EN 4688:2012 Aerospace series - Paints and varnishes - Corrosion inhibiting two components cold curing primer for military application
96/702217 DC : 0 PREN 4148 - AEROSPACE SERIES - PIPE COUPLINGS 60 DEGREES; IN ANODIZED ALUMINIUM ALLOY; TEES
17/30364786 DC : 0 BS EN 4827 - AEROSPACE SERIES - HEXAVALENT CHROMIUM FREE ANODIZING OF ALUMINIUM AND ALUMINIUM ALLOYS
17/30371341 DC : 0 PREN 4687 - AEROSPACE SERIES - PAINTS AND VARNISHES - CHROMATE FREE (NON CORROSION INHIBITING) TWO COMPONENT COLD CURING PRIMER - CHROMATE FREE PRIMER FOR MILITARY APPLICATION
09/30205302 DC : 0 BS EN 4687 - AEROSPACE SERIES - PAINTS AND VARNISHES - CHROMATE FREE (NON CORROSION INHIBITING) TWO COMPONENT COLD CURING PRIMER - CHROMAT FREE PRIMER FOR MILITARY APPLICATION
PD CEN/TR 14548:2003 Adhesives. Guide to test methods and other standards for the general requirements, characterization and safety of structural adhesives
96/702223 DC : 0 PREN 4226 - AEROSPACE SERIES - PIPE COUPLINGS 60 DEGREES; IN ANODIZED ALUMINIUM ALLOY, UNIONS; ELBOWS 90 DEGREES WITH FLEXIBLE TUBE FITTING END
BS EN 4534-2:2009 Aerospace series. Bushes, plain in aluminium alloy with self-lubricating liner, elevated load Dimensions and loads. Inch series
17/30371344 DC : 0 BS EN 4689 - AEROSPACE SERIES - PAINTS AND VARNISHES - TWO COMPONENTS COLD CURING POLYURETHANE FINISH - HIGH FLEXIBILITY AND CHEMICAL AGENT RESISTANCE FOR MILITARY APPLICATION
96/702221 DC : 0 PREN 4224 - AEROSPACE SERIES - PIPE COUPLINGS 60 DEGREES; IN ANODIZED ALUMINIUM ALLOY; UNIONS FOR FLEXIBLE TUBES
96/702209 DC : 0 PREN 4140 - AEROSPACE SERIES - PIPE COUPLINGS 60 DEGREE; IN ANODIZED ALUMINIUM ALLOYS; STRAIGHT UNIONS
I.S. EN 4689:2012 AEROSPACE SERIES - PAINTS AND VARNISHES - TWO COMPONENTS COLD CURING POLYURETHANE FINISH - HIGH FLEXIBILITY AND CHEMICAL AGENT RESISTANCE FOR MILITARY APPLICATION
96/702213 DC : 0 PREN 4144 - AEROSPACE SERIES - PIPE COUPLINGS 60 DEGREES; IN ANODIZED ALUMINIUM ALLOY; UNIONS, 4-WAY
PREN 3624 : 200P1 AEROSPACE SERIES - POLYSULPHIDE SEALANTS, TWO-COMPONENT - TECHNICAL SPECIFICATION
BS EN 4827:2017 Aerospace series. Hexavalent chromium free anodizing of aluminium and aluminium alloys
BS EN 4660-004:2011 Aerospace series. Modular and open avionics architectures Packaging
DIN EN 12392:2016-08 Aluminium and aluminium alloys - Wrought products and cast products - Special requirements for products intended for the production of pressure equipment
96/702212 DC : 0 PREN 4143 - AEROSPACE SERIES - PIPE COUPLINGS 60 DEGREES; IN ANODIZED ALUMINIUM ALLOY; CAP ASSEMBLY, FILTER
14/30314144 DC : 0 BS EN 2286 - AEROSPACE SERIES - BUSHES, FLANGED ALUMINIUM ALLOY WITH SELF-LUBRICATING LINER - DIMENSIONS AND LOADS
06/30151475 DC : 0 BS EN 4535-2 - AEROSPACE SERIES - BUSHES, FLANGED IN ALUMINIUM ALLOY WITH SELF-LUBRICATING LINER, ELEVATED LOAD - PART 2: DIMENSIONS AND LOADS - INCH SERIES
09/30205293 DC : 0 BS EN 4687 - AEROSPACE SERIES - PAINTS AND VARNISHES - CHROMATE FREE (NON CORROSION INHIBITING) TWO COMPONENT COLD CURING PRIMER - CHROMAT FREE PRIMER FOR MILITARY APPLICATION
09/30205299 DC : 0 BS EN 4688 - AEROSPACE SERIES - PAINTS AND VARNISHES - CORROSION RESISTANT CHROMATED TWO COMPONENT COLD CURING EPOXY PRIMER - HIGH CORROSION RESISTANCE FOR MILITARY APPLICATION
96/702222 DC : 0 PREN 4225 - AEROSPACE SERIES - PIPE COUPLINGS 60 DEGREES; IN ANODIZED ALUMINIUM ALLOY; PLUGS FOR TAPER UNION
96/702216 DC : 0 PREN 4147 - AEROSPACE SERIES - PIPE COUPLINGS 60 DEGREES; IN ANODIZED ALUMINIUM ALLOY; UNIONS, ELBOW 90 DEGREES
BS ISO 9738:2000 Turnbarrels, for aircraft control wire rope. Dimensions and loads
03/306585 DC : 0 EN 4400-7 - AEROSPACE SERIES - ALUMINIUM AND ALUMINIUM- AND MAGNESIUM- ALLOY PRODUCTS - TECHNICAL SPECIFICATION - PART 7: ALUMINIUM ALLOY FORGINGS
PREN 4688 : 200P1 AEROSPACE SERIES - PAINTS AND VARNISHES - CORROSION INHIBITING TWO COMPONENTS COLD CURING PRIMER FOR MILITARY APPLICATION
PREN 4687 : 200P1 AEROSPACE SERIES - PAINTS AND VARNISHES - CHROMATE FREE NON CORROSION INHIBITING TWO COMPONENTS COLD CURING PRIMER FOR MILITARY APPLICATION
I.S. CEN TR 14548:2003 ADHESIVES - GUIDE TO TEST METHODS AND OTHER STANDARDS FOR THE GENERAL REQUIREMENTS, CHARACTERIZATION AND SAFETY OF STRUCTURAL ADHESIVES
I.S. EN 4534-2:2016 AEROSPACE SERIES - BUSHES, PLAIN IN ALUMINIUM ALLOY WITH SELF-LUBRICATING LINER, ELEVATED LOAD - PART 2: DIMENSIONS AND LOADS - INCH SERIES
BS EN 12392:2016 Aluminium and aluminium alloys. Wrought products and cast products. Special requirements for products intended for the production of pressure equipment
BS EN 2556:1993 Rivets, solid, 100° normal countersunk head with dome, in aluminium alloy 5056A, anodized or chromated, inch based series
BS EN 2912:1996 Washers, flat, large diameter, in aluminium alloy, anodized or chromated
BS EN 2536:1995 Hard anodizing of aluminium alloys
BS EN 2122:1996 Washers, flat, in aluminium alloy, anodized or chromated
EN 4827:2017 Aerospace series - Hexavalent chromium free anodizing of aluminium and aluminium alloys
EN 4534-2:2016 Aerospace series - Bushes, plain in aluminium alloy with self-lubricating liner, elevated load - Part 2: Dimensions and loads - Inch series
EN 2284:1991 Aerospace series - Sulphuric acid anodizing of aluminium and wrought aluminium alloys
EN 2536:1995 Aerospace series - Hard anodizing of aluminium alloys
EN 2285:2017 Aerospace series - Bushes, plain, aluminium alloy, with self-lubricating liner - Dimensions and loads
EN 3032:1994 Aerospace series - Test method for dry film lubricants - Thickness measurement
EN 2149:1996 Aerospace series - Rivets, solid, universal head, in aluminium alloy 5056A, anodized or chromated, inch based series
EN 2145:1994 Aerospace series - Rivets, solid, universal head, in aluminium alloy 2117, anodized or chromated, inch based series
EN 4535-2:2016 Aerospace series - Bushes, flanged in aluminium alloy with self-lubricating liner, elevated load - Part 2: Dimensions and loads - Inch series
EN 2286:2017 Aerospace series - Bushes, flanged aluminium alloy, with self-lubricating liner - Dimensions and loads
EN 2556:1992 Aerospace series - Rivets, solid, 100° normal countersunk head with dome, in aluminium alloy 5056A, anodized or chromated, inch based series
EN 4704:2012 Aerospace series - Tartaric-Sulphuric-Acid anodizing of aluminium and aluminium wrought alloys for corrosion protection and paint pre-treatment (TSA)
EN 2912:1996 Aerospace series - Washers, flat, large diameter, in aluminium alloy, anodized or chromated
EN 4660-004:2011 Aerospace series - Modular and Open Avionics Architectures - Part 004: Packaging
EN 2552:1992 Aerospace series - Rivets, solid, 100° normal countersunk head with dome, in aluminium alloy 2117, anodized or chromated, inch based series
EN 2122:1996 Aerospace series - Washers, flat, in aluminium alloy, anodized or chromated
14/30314147 DC : 0 BS EN 4534-2 - AEROSPACE SERIES - BUSHES, PLAIN IN ALUMINIUM ALLOY WITH SELF-LUBRICATING LINER, ELEVATED LOAD - PART 2: DIMENSIONS AND LOADS - INCH SERIES
96/702219 DC : 0 PREN 4150 - AEROSPACE SERIES - PIPE COUPLINGS 60 DEGREES; IN ANODIZED ALUMINIUM ALLOY; NUTS, BULKHEAD
96/702227 DC : 0 PREN 4230 - AEROSPACE SERIES - PIPE COUPLINGS 60 DEGREES; IN ANODIZED ALUMINIUM ALLOY, UNIONS; STRAIGHT UNION WITH FLEXIBLE TUBE FITTING END
96/702228 DC : 0 PREN 4231 - AEROSPACE SERIES - PIPE COUPLINGS 60 DEGREES UP TO 1000 KPA; METRIC SERIES - TECHNICAL SPECIFICATION
96/702210 DC : 0 PREN 4141 - AEROSPACE SERIES - PIPE COUPLINGS 60 DEGREES; IN ANODIZED ALUMINIUM ALLOY; UNIONS, A-WAY, (IN-PLANE)
15/30327754 DC : 0 BS EN 4660-004 - AEROSPACE SERIES - MODULAR AND OPEN AVIONICS ARCHITECTURES - PART 004: PACKAGING
96/702224 DC : 0 PREN 4227 - AEROSPACE SERIES - PIPE COUPLINGS, 60 DEGREES; IN ANODIZED ALUMINIUM ALLOY, UNIONS, TEE, FOR FLEXIBLE TUBES
91/83289 DC : DRAFT DEC 1991 PREN 3624 - AEROSPACE SERIES - POLYSULPHIDE SEALANTS, TWO-COMPONENT - TECHNICAL SPECIFICATION
14/30314150 DC : 0 BS EN 4535-2 - AEROSPACE SERIES - BUSHES, FLANGED IN ALUMINIUM ALLOY WITH SELF-LUBRICATING LINER, ELEVATED LOAD - PART 2: DIMENSIONS AND LOADS - INCH SERIES
10/30215608 DC : 0 BS EN 4704 - AEROSPACE SERIES - TARTARIC-SULPHURIC-ACID ANODISING OF ALUMINIUM AND ALUMINIUM WROUGHT ALLOYS FOR CORROSION PROTECTION AND PAINT PRE-TREATMENT (TSA)
17/30364788 DC : 0 BS EN 3837 - AEROSPACE SERIES - PAINTS AND VARNISHES - NATURE AND METHOD FOR SURFACE PREPARATION OF TEST PIECES IN ALUMINIUM ALLOYS
BS EN 4688:2012 Aerospace series. Paints and varnishes. Corrosion inhibiting two components cold curing primer for military application
I.S. EN 4535-2:2016 AEROSPACE SERIES - BUSHES, FLANGED IN ALUMINIUM ALLOY WITH SELF-LUBRICATING LINER, ELEVATED LOAD - PART 2: DIMENSIONS AND LOADS - INCH SERIES
I.S. EN 4688:2012 AEROSPACE SERIES - PAINTS AND VARNISHES - CORROSION INHIBITING TWO COMPONENTS COLD CURING PRIMER FOR MILITARY APPLICATION
PREN 2552 : 3 AEROSPACE SERIES - RIVETS, SOLID, 100 DEGREES COUNTERSUNK NORMAL HEAD, WITH DOME, IN ALUMINIUM ALLOY 2117, ANODIZED OR CHROMATED, INCH BASED SERIES
PREN 4535-2 : 200P2 AEROSPACE SERIES - BUSHES, FLANGED IN ALUMINIUM ALLOY WITH SELF-LUBRICATING LINER, ELEVATED LOAD - PART 2: DIMENSIONS AND LOADS - INCH SERIES
PREN 3837 : 200P1 AEROSPACE SERIES - PAINTS AND VARNISHES - NATURE AND METHOD FOR SURFACE PREPARATION OF TEST PIECES IN ALUMINIUM ALLOYS
I.S. EN 4660-004:2011 AEROSPACE SERIES - MODULAR AND OPEN AVIONICS ARCHITECTURES - PART 004: PACKAGING
UNI EN 4704 : 2013 AEROSPACE SERIES - TARTARIC-SULPHURIC-ACID ANODIZING OF ALUMINIUM AND ALUMINIUM WROUGHT ALLOYS FOR CORROSION PROTECTION AND PAINT PRE-TREATMENT (TSA)
BS EN 3032:1994 Test method for dry film lubricants. Thickness measurement
BS EN 2286:1990 Specification for bushes flanged, aluminium alloy with self-lubricating liner. Dimensions and loads
BS EN 13101:2002 Steps for underground man entry chambers. Requirements, marking, testing and evaluation of conformity
CEN/TR 14548:2003 Adhesives - Guide to test methods and other standards for the general requirements, characterization and safety of structural adhesives
EN 13101:2002 Steps for underground man entry chambers - Requirements, marking, testing and evaluation of conformity

EN 2334:1997 Aerospace series - Chromic-sulphuric acid pickle of aluminium and aluminium alloys
ISO 2106:2011 Anodizing of aluminium and its alloys Determination of mass per unit area (surface density) of anodic oxidation coatings Gravimetric method
BS 6161-5:1982 Methods of test for anodic oxidation coatings on aluminium and its alloys Estimation of loss of absorptive power of sealed coatings: dye spot test with prior acid treatment
ISO 2376:2010 Anodizing of aluminium and its alloys Determination of electric breakdown potential
ISO 1463:2003 Metallic and oxide coatings Measurement of coating thickness Microscopical method
BS 6161-1:1984 Methods of test for anodic oxidation coatings on aluminium and its alloys Determination of mass per unit area (surface density) of anodic oxidation coatings (gravimetric method)
ISO 2143:2017 Anodizing of aluminium and its alloys — Estimation of loss of absorptive power of anodic oxidation coatings after sealing — Dye-spot test with prior acid treatment
BS 5466-1:1977 Methods for corrosion testing of metallic coatings Neutral salt spray test (NSS test)
ISO 2085:2010 Anodizing of aluminium and its alloys Check for continuity of thin anodic oxidation coatings Copper sulfate test
ISO 3768:1976 Metallic coatings — Neutral salt spray test (NSS test)

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