SH/T 0212-1998 Test method for removability of rust-preventive oil and grease films

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 title / English name / replacement relationship

• Standard number: SH/T 0212-1998 (confirmed in 2004)
• Chinese name: Test method for removability of rust-preventive oil and grease films
• English name: Rust preventive oils and greases--Test method of renwvabili ty (as in the source text, suspected to be removability, requires confirmation against the source standard (source-text extraction))
• Replacement relationship: replaces SH/T 0212-92
• Adoption relationship: equivalently adopts the method 'Test method for removability of rust-preventive oil and grease films' in 5.23 of Japanese Industrial Standard JIS K2246-1994 'Rust-preventive oil'
• Differences from JIS K2246-1994 5.23 (listed in the source text):
  1. The main apparatus for the film-removability test is a film-removal machine; the Japanese standard does not impose requirements on the model, and there is no manufacturer in our country, so a film-removal machine was self-made, and its structure and use functions meet the requirements of the Japanese standard.
  2. There is not yet a complete standardized series for the classification of rust-preventive oils and greases in our country, and some products are difficult to correspond to the Japanese NP series; the test conditions for various products in Table 1 can only be roughly the same as the Japanese NP series according to the actual situation in our country.
• Main differences from SH/T 0212-92 (listed in the source text):
  1. SH/T 0212-92 uses two types of wipers, and the wiping speed and total mass of the wiper are also different; this standard uses only one type of wiper, and the wiping speed and total mass of the wiper are also only one kind, and the test steps are changed accordingly.
  2. For lubricating-oil-type rust-preventive oil and displacement-type rust-preventive oil, SH/T 0212-92 uses a solvent oil rinsing method to remove the film, while this standard changes it to constant-speed immersion washing in solvent oil.
  3. SH/T 0212-92 specifies the use of test pieces from SH/T 0218; because SH/T 0218 was revised in 1993, the test pieces used in this standard are correspondingly changed to the A test pieces of the A method in SH/T 0218.
  4. SH/T 0212-92 does not specify the number of test pieces, and the result judgment is simply expressed as whether the film can be removed; this standard specifies that the number of test pieces is two, and the result judgment is made separately based on the film removal conditions of the two test pieces.
• Responsible organization: Research Institute of Petroleum Processing, China Petrochemical Corporation
• Drafting organization: Research Institute of Maoming Petrochemical Company
• Main drafters: Xu Mingfeng, Ruan Ruicheng
• First issued: 1992 year 5 month
• Approved by: China Petrochemical Corporation 1998-06-23 approval
• Implementation: 1998-12-01 implementation

2. Scope of application and non-application

• Scope of application: This standard specifies the test method for the removability of oil films of rust-preventive oils and greases after weathering tests, packaging and storage tests, and humid heat tests. This standard applies to rust-preventive oils and rust-preventive greases.
• Non-application: not provided in the available source.

3. Method principle

After the test piece coated with the sample has undergone a weathering test, packaging and storage test, or humid heat test, observe whether the oil film can be removed by solvent wiping or immersion washing. (Chapter 3 Method summary in the source text)

4. Reagents and materials (purity / preparation)

• 5.1 Petroleum ether: 60～90℃ (the source text is '60[unreadable separator]9090', requires confirmation against the source standard (source-text extraction)), analytical reagent grade.
• 5.2 Anhydrous ethanol: analytical reagent grade.
• 4.2 Materials:
  • 4.2.1 Test piece: material specifications and hanging hole conform to the A test piece in the SH/T 0218 A method; two test pieces are used in this test.
  • 4.2.2 Felt: thickness 18～19 mm, mass per square meter 400～700 g.
  • 4.2.3 Solvent oil: meets the specification requirements of SH 0005.

5. Instruments and equipment

• 4.1.1 Film-removability testing machine: wiping distance 50 mm, wiping speed is 30 times per minute ±2 times (the source text is '30 times*2 times', requires confirmation against the source standard (source-text extraction)), structure as shown in Figure 1.
• 4.1.2 Wiper: composed of a glass tube with inner diameter 7.5 mm and length 250 mm, a cork, a weight, and a wheel ring; the lower end of the tube is equipped with felt of 8 mm×6 mm×50 mm (the source text is '50[unreadable character]', requires confirmation against the source standard (source-text extraction)) as a core, and exposed outside the tube by 6～12 mm, structure as shown in Figure 1.
• 4.1.3 Beaker: 500 mL.
• 4.1.4 Hanger: domestic stainless steel wire or nickel-copper alloy wire, wire diameter 1 mm, total length 90～100 mm, shape as shown in Figure 2.
• Figure 1 Film-removability testing machine components (source text): 1— base; 2— eccentric wheel; 3— reversible motor (model N9-09, requires confirmation against the source standard (source-text extraction)); 4— connecting rod; 5— reciprocating movement device; 6— wheel ring; 7— weight; 8— cork; 9— glass tube; 10— metal conduit; 11— felt; 12— test piece.
• Figure 2 Hanger (the source text does not provide dimensional details).

6. Recommended operating conditions

• Total mass of wiper: 200 g±0.5 g (6.1.3).
• Wiping distance: 50 mm; wiping speed: 30 times per minute ±2 times (4.1.1, 6.1.5).
• The wiper swings reciprocally and returning to the original position is called one time (6.1.5).
• The number of wipes or immersion washing time depends on the type of test oil, see Table 1.
• Method without using a wiper: in a beaker containing 500 mL solvent oil, use a hanger to move the test piece up and down at a speed of 30 times per minute ±2 times for 1 min (6.2.3).

7. Sampling and sample preparation

• 6.1.1 Preparation of test pieces: two test pieces are required for each sample, prepared according to the method specified in SH/T 0218.
• 6.2.1 Preparation of test pieces: two test pieces are required for each sample, prepared according to the method specified in SH/T 0218.
• 6.1.2 The oil-coated test pieces are tested according to the provisions of Table 1.
• 6.2.2 The oil-coated test pieces are tested according to the provisions of Table 1.
• Sampling: not provided in the available source.

8. Analysis steps

6.1 Method using a wiper

• 6.1.1 Preparation of test pieces: two test pieces are required for each sample, prepared according to the method specified in SH/T 0218.
• 6.1.2 The oil-coated test pieces are tested according to the provisions of Table 1.
• 6.1.3 Pour solvent oil from the upper part of the glass tube, and cover with a cork so that the felt is completely moistened, then adjust the tightness of the cork until the solvent oil cannot naturally flow out from one end of the felt, and add a weight so that the total mass of the wiper is 200 g±0.5 g.
• 6.1.4 Install the wiper in a metal conduit with inner diameter 11 mm and length 100 mm, and adjust the wiper to be perpendicular to the center position of the test piece.
• 6.1.5 Start the film-removal testing machine, and carry out the film-removability test under the test conditions of wiping distance 50 mm and wiping speed of 30 times per minute ±2 times. The wiper swings reciprocally and returning to the original position is called one time. The number of wipes depends on the type of test oil, see Table 1.
• 6.1.6 Visually observe whether there is residual oil film on the surface of the test piece wiped by the wiper at a width of 6 mm.

6.2 Method without using a wiper

• 6.2.1 Preparation of test pieces: two test pieces are required for each sample, prepared according to the method specified in SH/T 0218.
• 6.2.2 The oil-coated test pieces are tested according to the provisions of Table 1.
• 6.2.3 In a beaker containing 500 mL solvent oil, use a hanger to move the test piece up and down at a speed of 30 times per minute ±2 times for 1 min.
• 6.2.4 After drying, visually inspect whether there is residual oil film on the test piece.

Table 1 Test conditions for various oil products

Note: In the "Soaking Time" column of Table 1, the original text marks "Soak 1min" only in the first row; for the other rows where no wiping tool is used, the original text does not mark the time row by row and requires confirmation against the source standard (source-text extraction).

9. Qualitative and Quantitative Determination and Calculation Formula

• 7 Result judgment:
  • 7.1 If both test pieces are confirmed to have no residual oil film, it is judged as capable of film removal. Otherwise, it is judged as incapable of film removal.
  • 7.2 If one of the test pieces is confirmed to have a residual oil film, the test must be repeated. If, in the repeated test result, more than one test piece is again confirmed to have a residual oil film, it is judged as incapable of film removal.
• 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

• GB/T 2361 Rust-preventive oils and greases — Humid heat test method
• SH 0005 Solvent naphtha for the paint industry
• SH/T 0083 Rust-preventive oil — Weathering test method
• SH/T 0218 Preparation method of test pieces for rust-preventive oils and greases
• SH/T 0584 Packaging and storage test method for rust-preventive oils and greases (louvered box method)
• Citation note (original text): The provisions included in the following standards constitute a part of this standard through citation. Unless otherwise expressly specified in the standard, the following cited standards are all currently effective standards.

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 for Questions and Answers