SH/T 0217-1998 Method for evaluating the rust grade of test specimens in rust-preventive oil and grease tests

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 / supersession relationship

• Method number (as appearing in the source): F-NY-SH-FXYZ-17805 (the source also has the string source-text extraction "FNYSHFXYZ17805")
• Chinese full name: Rust-preventive oil and grease — Method for evaluating the rust grade of test specimens
• English name: not provided in the available source
• Supersession relationship: not provided in the available source
• Method source (as marked in the source): SH/T 0217-1998 Method for evaluating the rust grade of test specimens in rust-preventive oil and grease tests

2. Scope of application and non-applicability

• Scope of application: This method is applicable to the evaluation of rust-preventive oils and rust-preventive greases.
• Non-applicability: not provided in the available source.

3. Method principle

• Method summary: Superimpose the evaluation plate on the test specimen, observe the number of squares occupied by rust spots, and thereby determine the rust grade.

4. Reagents and materials (purity / preparation)

• Not provided in the available source.

5. Instruments and equipment

• Evaluation plate (see Figure 1).
  • Effective measurement area: 50mm×50mm.
  • Material: made of colorless transparent material.
  • Dimensions: made as a flat plate of 60mm×80mm.
  • Squares: within the effective measurement area shown in the evaluation plate figure, engrave 100 square squares with side length 5mm×5mm, and the line width of the engraved lines is 0.5mm.

6. Recommended operating conditions

• Not provided in the available source.

7. Sampling and specimen preparation

• Not provided in the available source.

8. Analysis procedure

• 4.1 Superimpose the evaluation plate on the test specimen.
• 4.2 Observe with the naked eye, and count the number of squares within the effective area of the evaluation plate that have one or more rust spots.
  • Note: For rust spots appearing on engraved lines or intersections within the effective area, if they extend beyond the engraved line or intersection, all squares occupied by the extending part shall be counted as rusted. If the rust spot does not extend beyond the engraved line or intersection, and there is no rust in the adjacent squares, then one of the squares adjacent to it shall be counted as rusted.
• 4.3 Record the number of squares occupied by rust spots on the evaluation surface of the test specimen within the effective area of the evaluation plate as the rust degree (%) of the test specimen.

9. Qualitative and quantitative determination and calculation formula

• Rust degree (%): expressed as the number of squares occupied by rust spots on the evaluation surface of the test specimen within the effective area of the evaluation plate (see 4.3).
• Determination of rust grade: take the arithmetic mean of the rust degrees of each test specimen, round to an integer, and look up the corresponding rust grade according to Table 1 (see 5.1).
• Table 1 (rust grade | rust degree, %):
  • A | 0
  • B | 1～10
  • C | 11～25
  • D | 26～50
  • E | 50～100
  • Note: In Table 1, "B 1～10" appears in the source as two lines "1～" and "10" due to line breaks in typesetting, and has been merged according to meaning; "E 50～100" is as in the source, and overlaps with the upper limit 50 of D, requires confirmation against the source standard (source-text extraction).

10. Precision

• Not provided in the available source.

11. Report

• 5.1 Take the arithmetic mean of the rust degrees of each test specimen, round to an integer, and look up the corresponding rust grade according to Table 1.
• 5.2 Report the rust grade of the test specimen.
• 5.3 If the test specimen has discoloration or darkening, it shall be reported in the evaluation result.
  • Note: In the source, 5.3 and "it shall be reported in the evaluation result." were separated due to typesetting and have been merged according to meaning; requires confirmation against the source standard (source-text extraction).

12. Referenced documents

• Not provided in the available source (the source only marks the method source: SH/T 0217-1998).

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