SH/T 0106-1992 Test method for human sweat corrosion resistance of rust preventive oil

AI-translated method card — human verification pending. This is not an official translation of the standard. Unclear source values remain unverified; check the original standard and product certificate before use.

Card type: Test method

1. Method number / full name / English name / replacement relationship

• Standard number: SH/T 0106-92
• Full name: Test method for human sweat corrosion resistance of rust preventive oil
• English name: not provided in the available source
• Replacement relationship: not provided in the available source (the source text marks "(2001) confirmed")
• Approval/implementation: approved by China Petrochemical Corporation 1992-06-06, implemented on 1993-01-01
• Reference adoption: Japanese Industrial Standard JIS K2246-89 "Rust preventive oil", clause 5.32, operating corrosion resistance test method

2. Scope of application and non-applicability

• Scope of application: This standard applies to rust preventive oil.
• Non-applicability: not provided in the available source.

3. Method principle

After the test piece coated with the sample is stamped with artificial sweat and placed under 23℃±3℃ for 24h, observe whether the test piece has rust.

4. Reagents and materials (purity / preparation)

4.1 Reagents

• Methanol: chemically pure
• Sodium chloride: chemically pure
• Urea: chemically pure
• Lactic acid: chemically pure, 85%

4.2 Preparation of artificial sweat (6.1)

• Distilled water: 500mL
• Methanol: 500mL
• Sodium chloride: 7g～10.1g (requires confirmation against the source standard (source-text extraction): the source text is "7g 10.1g")
• Urea: 1g～10.1g (requires confirmation against the source standard (source-text extraction): the source text is "Ig10.lg")
• Lactic acid: 4g±0.1g

4.3 Preparation of stamping liquid (6.2)

Use 1 volume of artificial sweat and 2 volume of methanol to prepare a solution as the stamping liquid.

4.4 Materials

• Test piece: meets the material and specification requirements for test pieces in the SH/T 0218 A method; the two holes may be drilled on the long side or the short side of the test piece
• Glass plate: 150mm×150mm×5mm
• Gauze: degreased gauze, 35mm×35mm
• Rubber stopper: the diameter of the sweat-stamping face of the rubber stopper is about 26mm (requires confirmation against the source standard (source-text extraction): the source text is "26nvno")
• Weight: mass 1kg±0.02kg
• Sandpaper (or abrasive cloth): corundum sandpaper (or abrasive cloth) of grit 240

5. Instruments and equipment

• Constant-temperature oven: explosion-proof type, capable of maintaining 23℃±3℃
• Simple humidifying tank: a desiccator with a small amount of distilled water at the bottom

6. Recommended operating conditions

• Oil immersion temperature: 23℃±3℃
• Immersion time: 1min
• Lifting speed: about 100mm/min (lift vertically)
• Drying conditions: three pieces are stamped with sweat after drying for 30min; the other three pieces are stamped with sweat after drying for 16h
• Placement after sweat stamping: place under 23℃±3℃ for 24h
• Amount of stamping liquid added dropwise: 1.5mL
• Time for the rubber stopper to be placed on the gauze: about 2s
• Stamping time: about 1s (requires confirmation against the source standard (source-text extraction): the source text is "about is")
• Time required for each test piece from dropping the stamping liquid onto the gauze to completion of stamping: 20s±5s

7. Sampling and test specimen preparation

• Prepare test pieces according to the SH/T 0218 A method (6.4).
• Roughen the sweat-stamping face of the rubber stopper with 240 grit sandpaper (or abrasive cloth), wash sequentially with neutral detergent and distilled water, then dry (6.3).

8. Analysis procedure

7.1 Immerse the test pieces prepared in clause 6.4 vertically into the sample at 23℃±3℃; after immersion for 1min, lift vertically at a speed of about 100mm/min. Three of the pieces are stamped with sweat according to clause 7.2 after drying for 30min; the other three pieces are stamped with sweat according to clause 7.2 after drying for 16h. 7.2 Place 32 pieces of gauze overlapping on a glass plate, and drop the stamping liquid prepared in clause 6.2 at the center in an amount of 1.5mL. Add a weight onto the rubber stopper by an appropriate method, place the rough face of the rubber stopper downward on the overlapping gauze for about 2s, then immediately move it together with the weight to the center of the dried test piece and stamp for about 1s; the gauze must be replaced after each stamping. The time required for each test piece from dropping the stamping liquid onto the gauze to completion of stamping is 20s±5s. 7.3 Place the stamped test pieces into a simple humidifying tank and leave them under 23℃±3℃ for 24h. 7.4 Take out the test pieces and visually inspect whether there is rust at the stamped areas of the test pieces.

9. Qualitative and quantitative determination and calculation formula

• Result judgment (8): when there is no rust at the stamped areas of all six test pieces, the test pieces are judged as "no rust"; otherwise, they are judged as "rust".
• Calculation formula: not provided in the available source.

10. Precision

not provided in the available source.

11. Report

If the test pieces are "no rust", the sample is reported as "qualified"; otherwise, it is reported as "unqualified".

12. Referenced documents

• SH/T 0218 Preparation method of test pieces for rust preventive grease and oil tests

13. Source and verification

This page is an AI translation of the available Chinese method card. Human verification is pending. It is not an official translation of the standard. Check the source standard and product certificate before use.

14. Quick reference Q&A