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GB/T 6466-2008: Electrodeposited chromium coatings -- Electrolytic corrosion testing (EC test)
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Std ID	Version	USD	Buy	Deliver [PDF] in	Title (Description)
GB/T 6466-2008	English	174	Add to Cart	3 days [Need to translate]	Electrodeposited chromium coatings -- Electrolytic corrosion testing (EC test)
GB/T 6466-1986	English	319	Add to Cart	3 days [Need to translate]	Electrodeposited chromium coatings--Electrolytic corrosion testing (EC test)

GB/T 6466-2008: Electrodeposited chromium coatings -- Electrolytic corrosion testing (EC test)

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Electrodeposited chromium coatings. Electrolytic corrosion testing \\ (EC test) ICS 25.220.40 A29 National Standards of People's Republic of China GB/T 6466-2008/ISO 4539. 1980 Replacing GB/T 6466-1986 Electrodeposited chromium layer Electrolytic corrosion test (EC test) (ISO 4539. 1980, IDT) Posted 2008-06-19 2009-01-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

This standard is identical with ISO 4539. 1980 "electrodeposited chromium layer of electrolytic corrosion test (EC test)" (in English). For ease of use, this standard to the following editorial changes. --- Canceled international standards foreword; --- Use the "standard" instead of "this International Standard." This standard replaces GB/T 6466-1986 "electrodeposited chromium layer of electrolytic corrosion test (EC test)." And GB/T 6466-1986 phase Than the main changes. --- Increasing the introductory phrase of normative references; --- According to China standard format re-edited the standard format. Appendix A of this standard is a normative appendix. The standard proposed by China Machinery Industry Federation. This standard layer Standardization Technical Committee (SAC/TC57) administered by the National Metal and non-metal cover. This standard was drafted. Wuhan Institute of Material Protection, Zhenjiang City Electric Co., Ltd. COSCO. The main drafters of this standard. Wong Wing, Yu Jing, Xu Yanfei, Pan neighborhood, JIA Jian new Pan dry, Xia. This standard replaces the standards previously issued as follows. --- GB/T 6466-1986. GB/T 6466-2008/ISO 4539. 1980 Electrodeposited chromium layer Electrolytic corrosion test (EC test)

1 Scope

1.1 standard provides fast and accurate evaluation of steel or copper zinc alloy castings - Nickel - Chromium and Nickel - outdoor corrosion resistance of chromium electrodeposited layer side law. Duration and results of the product in outdoor use, this standard have not been described and explained. 1.2 to 1.1 than other systems or materials deposited layer using this test method, the method should be verified prior to their outdoor use phase Shall relationship. 1.3 This standard test conditions provided in [1], the electrolytic nickel layer is a layer of chromium by discontinuities (chromium layer is not etched) performed. Electrolytic corrosion The extent of corrosion rate test is equivalent to using an electrolytic 2min in [2] [3] level. When the nickel layer increases the exposed area quickly (such as high Density of the sample surface discontinuities chromium), the EC test rate will exceed its outdoor corrosion rate corresponding to the test, in order to ensure the same Corrosion rate, when the surface of the sample reaches a predetermined current density, by potentiostatic control to the constant current control.

2 Reagents

Using analytical reagent, distilled water or purified water equivalent formulation. 2.1 electrolyte 2.1.1 electrolyte A, zinc for corrosion spots base or steel base sample identification when the indicator solution after electrolysis. Per liter of electrolyte components. Sodium nitrate (NaNO3) 10.0g Sodium chloride (NaCl) 1.3g Concentrated nitric acid (HNO3) (ρ = 1.42g/mL) 5.0mL With distilled water to 1L Bath life. 900C/L. 2.1.2 electrolyte B, used to test the steel substrate samples, corrosion point differential in the electrolyte (see Chapter 6). Per liter of electrolyte components. Sodium nitrate (NaNO3) 10.0g Sodium chloride (NaCl) 1.0g Concentrated nitric acid (HNO3) (ρ = 1.4g/mL) 5.0mL 1,10-phenanthroline hydrochloride 1.0g With distilled water to 1L Bath life.200C/L or until the color of the solution conceal corrosion spots of color produced so far. 2.2 Indicator Solution 2.2.1 Solution C, for the identification of corrosion points electrolytic zinc matrix sample. Per liter of solution components. Glacial acetic acid (CH3COOH) 2mL GB/T 6466-2008/ISO 4539. 1980 ...