SH/T 0036-1990 Water displacement test method for 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 0036-90
• Chinese name: Water displacement test method for rust preventive oil
• English name: not provided in the available source
• Replacement relationship: not provided in the available source (the source text marks "(2〕[unreadable year] confirmation", suspected to be year designation confirmation information, requires confirmation against the source standard (source-text extraction))
• Reference adoption: the water displacement test method in clause 5.29 of Japanese Industrial Standard JIS K 2246-1989 "Rust preventive oil"

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 a test specimen soaked in distilled water is immersed in the sample for 15s, it is placed in a constant-temperature humid heat chamber and kept at 23℃±3℃ for 1h, to observe whether there is corrosion or stain on the test specimen.

4. Reagents and materials (purity / preparation)

• Anhydrous ethanol: analytical grade.
• Metal test specimen: meets the material and dimensional specification requirements for the steel specimen in method SH/T 0218 A, but both holes are punched on the edge of the 60mm side of the test specimen.
• Emery cloth (or abrasive paper): grade 100 corundum emery cloth (or abrasive paper).
• Solvent naphtha for rubber industry: meets the requirements of SH 0004.
• Distilled water: purity specification not provided in the available source.

5. Instruments and equipment

• Culture dish: diameter 120mm.
• Ground-glass-stoppered conical flask: [unreadable character]OML (requires confirmation against the source standard (source-text extraction), suspected to be 150mL).
• Constant-temperature humid heat chamber: capable of controlling temperature 23℃±3℃ (or a desiccator containing a small amount of distilled water may be used).
• Stopwatch: graduation 0.2s.

6. Recommended operating conditions

• Sample preparation temperature: 23℃±3℃.
• Standing temperature after the sample is mixed with water: 55℃±2℃, standing for not less than 12h.
• Time for the test specimen to be immersed in the sample after soaking: 15s.
• Hanging conditions after the test specimen is lifted: hang at 23℃±3℃ for 15min.
• Placement conditions in the constant-temperature humid heat chamber: place at 23℃±3℃ for 1h.
• Time from lifting the test specimen to immersing it in the sample: must not exceed 5s.
• Total time for storage, cleaning and coating of the test specimen with sample: must not exceed 24h, otherwise regrind.

7. Sampling and sample preparation

• Sample preparation: at 23℃±3℃, measure 50mL of sample into a ground-glass-stoppered conical flask, then add 5mL of distilled water, cover the stopper, invert up and down once as one time, invert about ten times to mix uniformly. Place at 55℃±2℃ for not less than 12h. After removal, let it cool statically to 23℃±3℃, shake uniformly, and pour into a culture dish for later use.
• Test specimen grinding: the edges and corners, four sides, two holes and test surface of the test specimen shall be ground with grade 100 emery cloth. The grain direction of the test surface is parallel to the line connecting the centers of the two holes. The surface of the test specimen used for the test shall not have pits, scratches or rust marks. After grinding, the test specimen shall not be directly touched by hand. After the ground test specimen is wiped with absorbent cotton to remove attached matter such as abrasive grains, wrap it with filter paper and immediately place it in a desiccator.
• Test specimen cleaning: use tweezers to hold absorbent cotton, and scrub the test specimen in anhydrous ethanol and boiling anhydrous ethanol in sequence. After scrubbing in boiling anhydrous ethanol, immediately blow dry with hot air, then place in a clean desiccator to cool to 23℃±3℃.

8. Analysis procedure

1. Immerse the three test specimens prepared in clause 6.2 into distilled water so that they are fully soaked (otherwise they shall be treated again), then immediately lift them and keep them vertical, and use qualitative filter paper to absorb residual water at the bottom. Quickly immerse them horizontally into a culture dish containing the sample; the time from lifting the test specimen to immersing it in the sample must not exceed 5s.
2. After the test specimen stands in the sample for 15s, immediately lift it, and hang it at 23℃±3℃ for 15min to drain excess oil droplets.
3. Place the test specimen horizontally in a constant-temperature humid heat chamber, place at 23℃±3℃ for 1h, take out the test specimen and wash off the oil film with solvent naphtha for rubber industry for inspection.

9. Qualitative and quantitative determination and calculation formula

• Result judgment: the upper surface of the test specimen in the constant-temperature humid heat chamber is the judgment surface. If all three test specimens have no corrosion or stain, it is judged as qualified.
• Calculation formula: not provided in the available source.

10. Precision

not provided in the available source.

11. Report

not provided in the available source.

12. Referenced documents

• SH 0004 Solvent naphtha for rubber industry
• SH/T 0218 Preparation method of test specimens for rust preventive grease testing

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 Q&A reference