1 - AS 4036:1992 CORROSION OF METALS - DISSIMILAR METALS IN CONTACT IN SEAWATER
4 - PREFACE
5 - CONTENTS
6 - FOREWORD
7 - SECTION 1 - SCOPE AND GENERAL
7 - 1.1 SCOPE
7 - 1.2 REFERENCED DOCUMENTS
7 - 1.3 DEFINITIONS
8 - SECTION 2 - FACTORS INFLUENCING GALVANIC CORROSION
8 - 2.1 SCOPE OF SECTION
8 - 2.2 POTENTIAL DIFFERENCE BETWEEN DISSIMILAR METALS
8 - 2.3 NATURE OF THE ELECTROLYTE
9 - 2.4 CATHODE/ANODE AREA RELATIONSHIP
9 - 2.5 METALLURGICAL CONDITION OF THE METAL
9 - 2.6 DEFECTS IN METALLIC COATINGS
9 - 2.6.1 General
9 - 2.6.2 Cathodic coatings
9 - 2.6.3 Anodic coatings
10 - 2.7 NOBLE (CATHODIC) METAL ION CONTAMINATION
10 - 2.8 CARBONACEOUS MATERIALS
10 - 2.9 MOVEMENT OF ELECTROLYTE
10 - 2.10 FORMATION OF SURFACE FILMS (CORROSION PRODUCTS)
10 - 2.11 POLARITY REVERSAL
10 - 2.12 TEMPERATURE
11 - SECTION 3 - CONTROL OF GALVANIC CORROSION
11 - 3.1 SCOPE OF SECTION
11 - 3.2 FEATURES OF DESIGN
11 - 3.3 INSULATION
11 - 3.4 CATHODIC PROTECTION
11 - 3.5 COATINGS
11 - 3.5.1 Metallic coatings
11 - 3.5.2 Non-metallic coatings
12 - 3.6 PASSIVATION OF THE METAL SURFACE
12 - 3.7 JOINTING AND SEALING COMPOUNDS
12 - 3.8 INHIBITORS
13 - SECTION 4 - COMPATIBILITY OF DISSIMILAR METALS IN CONTACT
13 - 4.1 SCOPE OF SECTION
13 - 4.2 CODE FOR RATING DISSIMILAR METALS
13 - 4.3 CORROSION RESISTANCE OF DISSIMILAR METALS IN CONTACT WHEN IMMERSED IN SEAWATER
15 - APPENDIX A - TEST METHOD FOR THE DETERMINATION OF ELECTROCHEMICAL CORROSION RATINGS FOR PAIRS OF DISSIMILAR METALS IMMERSED..
15 - A1 SCOPE
15 - A2 PRINCIPLE
15 - A3 APPARATUS
15 - A3.1 Zero resistance ammeter (ZRA)
15 - A3.2 High impedance voltmeter
15 - A3.3 Test cell holder
15 - A3.4 Reference electrode
15 - A3.5 Glassware
15 - A4 REAGENTS
15 - A4.1 General
15 - A4.2 Sodium chloride
15 - A4.3 Sodium sulfate (anhydrous)
15 - A4.4 Stock Solution No. 1
15 - A4.5 Stock Solution No. 2
18 - A4.6 Sodium hydroxide solution
18 - A5 PREPARATION OF ARTIFICIAL SEAWATER
18 - A6 SAMPLE PREPARATION - TYPE 1 (CYLINDRICAL)
18 - A6.1 General
18 - A6.2 Sample size
18 - A6.3 Machining the sample
18 - A6.4 Electrical connection
18 - A6.5 Sample mount
18 - A6.6 Sample assembly
19 - A6.7 Grinding and polishing
20 - A7 SAMPLE PREPARATION - TYPE 2 (SHEET)
20 - A7.1 General
20 - A7.2 Electrical connection
21 - A7.3 Sealing
21 - A7.4 Sample assembly
21 - A8 PREPARATION FOR TEST
22 - A9 TEST PROCEDURE
22 - A9.1 General
22 - A9.2 Procedure
22 - A10 METHOD OF DETERMINATION OF CODE FOR THE RATING OF TEST RESULTS
24 - A11 TEST REPORT
24 - A12 SIGNIFICANCE OF TEST RESULTS
25 - APPENDIX B - BASIC THEORY OF GALVANIC CORROSION
25 - B1 SCOPE OF SECTION
25 - B2 CORROSION PROCESS
25 - B3 CORROSION CELLS
26 - B4 GALVANIC SERIES FOR METALS AND ALLOYS IMMERSED IN SEAWATER BASED ON CORROSION POTENTIAL MEASUREMENTS