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鍍層标記代号a （B類b） | 公稱鍍層 厚度/μm | 鉻酸鹽 處理标記c | 第1次出現白色腐蝕物時間/h | 第1次出現紅色鐵鏽時間/h | |
镉鍍層 | 鋅鍍層 | ||||
Fe/Zn或Fe/Cd3c1A | 3d | A | 2 | 24 | 12 |
Fe/Zn或Fe/Cd3c1B | B | 6 | 24 | 12 | |
Fe/Zn或Fe/Cd3c2C | C | 24 | 36 | 24 | |
Fe/Zn或Fe/Cd3c2D | D | 24 | 36 | 24 | |
Fe/Zn或Fe/Cd5c1A | 5 | A | 6 | 48 | 24 |
Fe/Zn或Fe/Cd5c1B | B | 12 | 72 | 36 | |
Fe/Zn或Fe/Cd5c2C | C | 48 | 120 | 72 | |
Fe/Zn或Fe/Cd5c2D | D | 72 | 168 | 96 | |
Fe/Zn或Fe/Cd5Bk | BK | 12 | / | / | |
Fe/Zn或Fe/Cd8c1A | 8 | A | 6 | 96 | 48 |
Fe/Zn或Fe/Cd8c1B | B | 24 | 120 | 72 | |
Fe/Zn或Fe/Cd8c2C | C | 72 | 168 | 120 | |
Fe/Zn或Fe/Cd8c2D | D | 96 | 192 | 144 | |
Fe/Zn或Fe/Cd8Bk | BK | 24 | 120 | 72 | |
Fe/Zn或Fe/Cd12c1A | 12 | A | 6 | 144 | 72 |
Fe/Zn或Fe/Cd12c1B | B | 24 | 192 | 96 | |
Fe/Zn或Fe/Cd12c2C | C | 72 | 240 | 144 | |
Fe/Zn或Fe/Cd12c2D | D | 96 | 264 | 168 | |
Fe/Zn或Fe/Cd12Bk | BK | 24 | 192 | 96 | |
Fe/Zn或Fe/Cd25c1A | 25 | A | 尚無合适數據 | ||
Fe/Zn或Fe/Cd25c1B | B | ||||
Fe/Zn或Fe/Cd25c2C | C | ||||
Fe/Zn或Fe/Cd25c2D | D | ||||
Fe/Zn或Fe/Cd25Bk | BK | ||||
a、鋅鍍層的類型代号，見GB/T 9799；镉鍍層的類型代号，見GB/T 13346。 b、代号标記方法，見第13章。 c、鉻酸鹽處理的标記，見下表。 d、薄鍍層削弱鉻酸鹽處理的性能。 | |||||
分級 | 類型代号 | 類型 | 典型外觀 | 防護性 |
1 | A | 光亮 | 透明的、光亮的、有時帶輕微的藍色 | 輕度，如：手持時的防鏽或者 在中等腐蝕條件下防高濕 |
B | 漂白 | 略帶彩虹色且透明的 | ||
2 | C | 彩虹 | 黃彩虹色的 | 相當好，包括對某些有氣氛的 防護 |
D | 不透明 | 橄榄綠隐約可見棕色或青銅色 | ||
| Bka | 黑色 | 略帶彩虹色的黑色 | 不同程度的腐蝕防護性 |
注：本表比GB/T 9800補充了黑色處理。 | ||||
a、除A~D外，還可選擇黑色膜層。 | ||||
鍍層标記a（B類b） | 有效表面第1次出現紅色鐵鏽 | ||||
銅或銅合金基體 | 鐵金屬材料基體 | 中性鹽霧試驗 （NSS）e | 銅加速鹽霧 試驗（CASS） | ||
鎳 | 鎳+鉻c,d | 鎳c | 鎳+鉻或銅+鎳+鉻c,d | ||
Cu/Ni 3b | Cu/Ni 3b Cr r | Fe/Ni 5b | Fe/Ni 5b Cr | / | / |
Cu/Ni 5b | Cu/Ni 5b Cr r | Fe/Ni 10b | Fe/Ni 10b Cr Fe/Cu 10Ni 5b Cr r | 12h | _f |
C u/Ni 10b | Cu/Ni 10b Cr r | Fe/Ni 20b | Fe/Ni 20b Cr Fe/Cu 20Ni 10b Cr r | 48h | _f |
Cu/Ni 20b | Cu/Ni 20b Cr r | Fe/Ni 30b | Fe/Ni 30b Cr | / | 8h |
不推薦 | Cu/Ni 30b Cr r | 不推薦 | Fe/Ni 40b Cr | / | 16h |
a、鎳鍍層的類型代号，見GB/T 9797。 b、代号标記方法，見第13章。 c、“b”表示光亮鎳鍍層，而“d”表示鍍層雙層鎳。 d、“r”表示普通套鍍鉻，最小厚度0.3μm。 e、對Ni/Cr鍍層，通常不規定進行中性鹽霧試驗（NSS）。 f、對較薄的鍍層，在銅加速鹽霧試驗（CASS）中，由于實施時間太短而無意義。 | |||||
Metallic and other inorganic coatings - Electrodeposited coatings of nickel, nickel plus chromium, copper plus nickel and of copper plus nickel plus chromium
Fasteners - Fundamentals of hydrogen embrittlement in steel fasteners
Metallic coatings - Hot dip galvanized coatings on fabricated iron and steel articles - Specifications and test methods
Fasteners - Hot dip galvanized coatings
Metallic coatings - Electrodeposited coatings of nickel
Chemical conversion coatings - Black oxide coating on iron and steel - Specification and test methods
Specifications of Zinc / Chromate coatings
Chromate conversion coatings on electroplated zinc and cadmium coatings
Metallic coatings - Electroplated coatings of zinc and zinc alloys on iron or steel with supplementary Cr(Vl)-free treatment
Metallic coatings - Hot dip galvanized coatings on fabricated iron and steel articles - Specifications and test methods
Fasteners - Non-electrolytically applied zinc flake coatings systems
Fasteners - Electroplated coating systems
Corrosion of metals and alloys - Corrosivity of atmospheres - Classification, determination and estimation
Fasteners—Hot dip galvanized coatings
Passivation of corrosion-resistant stainless-steel fasteners
Metallic coatings - Electrodeposited coatings of nickel
Chromate conversion coatings on electroplated zinc and cadmium coatings
Metallic coatings - Electroplated coatings of copper plus nickel plus chromium on iron or steel
Metallic and Other Inorganic Coatings - Electroplated Coatings of Zinc with Supplementary Treatments on Iron or Steel
Metallic and other inorganic coatings - Electrodeposited coatings of nickel, nickel plus chromium, copper plus nickel and of copper plus nickel plus chromium
Sherardizing of iron and steel articles
Aerospace series - Electrolytic silver plating of fasteners
Corrosion Protection of Metals - Electrodeposited Coatings of Zinc with Supplementary Treatment on Iron or Steel
Fasteners - surface discontinuities - nuts
Fasteners - Surface Discontinuities - Part 1: Bolts, Screws and Studs for General Requirements
Fasteners - Surface Discontinuities - Part 3: Bolts, Screws and Studs for Special Requirements
Water-based epoxy anticorrosive coatings
Electroplated coatings on threaded components - Part 1: Cadmium on Steel Components - Part 2: Zinc on Steel Components
Selection principle and thickness series for metallic and chemical coating
Specification for electroplated coatings of zinc on iron and steel
General specification for fastener aluminum coating for aircraft
