This document specifies two accelerated corrosion-test procedures, Methods A and B, for the comparative evaluation of metallic materials with or without permanent corrosion protection or temporary corrosion protection in outdoor salt and\/or acid rain environments. It also specifies the apparatus used. The two tests involve cyclic exposure of the specimens to acidified salt spray, \u201cdry\u201d and \u201cwet\u201d conditions.<\/p>\n
The particular advantages of the two tests over conventional accelerated tests, such as the neutral salt spray (NSS) test as specified in ISO 9227 lie in their better ability to reproduce the corrosion that occurs in outdoor salt and\/or acid rain environments. They are also useful for evaluating cosmetic corrosion.<\/p>\n
Method A is applicable to<\/p>\n
metals and their alloys,<\/p>\n<\/li>\n
metallic coatings (cathodic),<\/p>\n<\/li>\n
anodic oxide coatings, and<\/p>\n<\/li>\n
organic coatings on metallic materials.<\/p>\n<\/li>\n<\/ul>\n
Method B is applicable to<\/p>\n
steel coated with anodic coatings, and<\/p>\n<\/li>\n
steel coated with anodic coatings covered with conversion coatings.<\/p>\n<\/li>\n<\/ul>\n
| PDF Pages<\/th>\n | PDF Title<\/th>\n<\/tr>\n | ||||||
|---|---|---|---|---|---|---|---|
| 2<\/td>\n | National foreword <\/td>\n<\/tr>\n | ||||||
| 4<\/td>\n | European foreword <\/td>\n<\/tr>\n | ||||||
| 6<\/td>\n | Foreword <\/td>\n<\/tr>\n | ||||||
| 7<\/td>\n | Introduction <\/td>\n<\/tr>\n | ||||||
| 9<\/td>\n | 1 Scope 2 Normative references 3 Terms and definitions <\/td>\n<\/tr>\n | ||||||
| 10<\/td>\n | 4 Test solution 4.1 General 4.2 Method A 4.2.1 Neutral sodium chloride solution 4.2.2 Preparation of the acidified-salt solution <\/td>\n<\/tr>\n | ||||||
| 11<\/td>\n | 4.3 Method B 4.3.1 Preparation of the mixed salt solution 4.3.2 Preparation of the acidic solution 4.3.3 Preparation of the acidified-salt solution 5 Apparatus 5.1 Component protection. <\/td>\n<\/tr>\n | ||||||
| 12<\/td>\n | 5.2 Test cabinet. 5.3 Humidity and temperature control. 5.4 Spraying device. 5.5 Air saturator. 5.6 Collecting devices. <\/td>\n<\/tr>\n | ||||||
| 13<\/td>\n | 5.7 Air dryer. 5.8 Exhaust system. 5.9 Drain system. 6 Test specimens 7 Arrangement of the test specimen <\/td>\n<\/tr>\n | ||||||
| 14<\/td>\n | 8 Operating condition <\/td>\n<\/tr>\n | ||||||
| 16<\/td>\n | 9 Continuity of tests 10 Duration of the tests 11 Treatment of test specimens after test 11.1 General 11.2 Non-organic coated test specimens: metallic and\/or inorganic coated 11.3 Organic coated test specimens 11.3.1 Scribed organic coated test specimens <\/td>\n<\/tr>\n | ||||||
| 17<\/td>\n | 11.3.2 Organic coated but not scribed test specimens 12 Evaluation of results 13 Test report <\/td>\n<\/tr>\n | ||||||
| 19<\/td>\n | Annex A (informative) Relationship between amounts of acidic stock solution added to mixed salt solution and pH of the resulting acidified-salt solution <\/td>\n<\/tr>\n | ||||||
| 20<\/td>\n | Annex B (informative) Typical apparatus for accelerated cyclic tests with exposure to acidified salt spray, dry and wet conditions <\/td>\n<\/tr>\n | ||||||
| 22<\/td>\n | Annex C (informative) Method for evaluation of the corrosivity of the apparatus <\/td>\n<\/tr>\n | ||||||
| 24<\/td>\n | Annex D (normative) Preparation of test specimens with organic coatings for testing <\/td>\n<\/tr>\n | ||||||
| 25<\/td>\n | Annex E (normative) Required supplementary information for testing test specimens with organic coatings <\/td>\n<\/tr>\n | ||||||
| 26<\/td>\n | Bibliography <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":" Corrosion of metals and alloys. Accelerated cyclic test with exposure to acidified salt spray, dry and wet conditions<\/b><\/p>\n |