SH/T 0083-1991 Weathering 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 0083-91
• Full name: Weathering test method for rust-preventive oil
• English name: not provided in the available source
• Replacement relationship: not provided in the available source (the source notes "(confirmed in 2000)")
• Approval/implementation: approved by China Petrochemical Corporation in 1991-11-26, implemented in 1992-12-01
• Reference adoption: weathering test method in clause 5.36 of Japanese Industrial Standard JIS K 2246-89 "Rust-preventive oil"

2. Scope of application and non-applicability

• Scope of application: applicable to solvent-diluted hard-film rust-preventive oil.
• Non-applicability: not provided in the available source.

3. Method principle

Place the test specimen coated with the sample in a weathering test machine; after the specified test time, take out the test specimen and inspect the aging resistance and rust-preventive performance of the oil film.

4. Reagents and materials (purity / preparation)

• 4.1 Weathering test machine: should have automatic control devices for light source, temperature, humidity, rainfall, rotating specimen rack, etc., to simulate suitable artificial climatic conditions. Its structure is shown in the figure in the source. This equipment can satisfy the following test conditions.
  • 4.1.1 Light source
    • a. Neon lamp specification: 6kW water-cooled neon lamp; after use for 600h it must be replaced with a new lamp;
    • b. Distance between light source and specimen panel: 37cm±2cm;
    • c. Neon lamp cooling water: use distilled water for circulating cooling to prevent scaling on the lamp tube.
  • 4.1.2 Temperature
    • a. Specimen temperature: based on black panel thermometer 63℃±3℃ as the standard; the black panel thermometer is placed in the same position as the specimen;
    • b. Working temperature: dry bulb is 49℃±1℃.
  • 4.1.3 Relative humidity: 80%±5%.
  • 4.1.4 Rainfall
    • a. Rainfall time: 12min/h;
    • b. Nozzles: four in total, capable of uniformly spraying the specimen;
    • c. Rainfall water pressure: 78—118kPa;
    • d. Rainfall water volume: 2.0—2.2L/min;
    • e. Rainfall water quality: distilled water or clean tap water, with its pH value between 6.0—8.0.
  • 4.1.5 Specimen rack
    • a. The specimen rack is made of aluminum alloy;
    • b. Specimen rack rotation speed: 1 r/min, so that the specimen is uniformly exposed to irradiation and rain.
  • 4.1.6 Environment: the environment where the weathering test machine is placed should be well maintained, and pollution by corrosive gases (such as sulfur dioxide, hydrogen sulfide, ammonia, etc.) must be strictly prevented.
• 4.2 Test specimen: the material and size of the test specimen conform to the steel panel in method SH/T 0218, but the two holes are punched on the edge of 60mm.
• 5 Reagents
  • 5.1 Petroleum ether: analytical grade, 60—90℃.
  • 5.2 Solvent naphtha for rubber industry: meets the requirements of SH 0004.

5. Instruments and equipment

• Weathering test machine (see 4.1, including automatic control devices for light source, temperature, humidity, rainfall, rotating specimen rack, etc.).
• Weathering test machine figure components (source figure captions): 1- speed reducer; 2- door; 3- observation window; 4- specimen rack; 5- exhaust door; 6- water sprayer; 7- neon lamp; 8- rain device; 9- photosensitive element; 10- dry bulb platinum resistance; 11- wet bulb platinum resistance thermometer; 12- wet bulb water tank; 13- wet bulb supply water tank; 14- heater; 15- fan; 16- light energy indicator; 17- water temperature indication control instrument; 18- heating water tank; 19- dry and wet bulb control recorder; 20- solenoid valve; 21- inlet water pressure relay; 22- neon lamp water pressure relay; 23- neon lamp water tank; 24- water tank; 25- rainfall water tank.

6. Recommended operating conditions

• Light source: 6kW water-cooled neon lamp; after use for 600h it must be replaced with a new lamp; distance between light source and specimen panel 37cm±2cm; neon lamp cooling water uses distilled water for circulating cooling.
• Temperature: specimen temperature is based on black panel thermometer 63℃±3℃ as the standard; working temperature dry bulb is 49℃±1℃.
• Relative humidity: 80%±5%.
• Rainfall: rainfall time 12min/h; four nozzles in total; rainfall water pressure 78—118kPa; rainfall water volume 2.0—2.2L/min; rainfall water quality is distilled water or clean tap water, pH 6.0—8.0.
• Specimen rack: made of aluminum alloy; rotation speed 1 r/min.
• Environment: strictly prevent pollution by corrosive gases (such as sulfur dioxide, hydrogen sulfide, ammonia, etc.).
• Operating schedule: continuous operation; start up each day for 23h, shut down for 1h; test time is calculated as 24h.

7. Sampling and specimen preparation

• 6.1 Preparation of test specimen
  • 6.1.1 According to method SH/T 0218, polish and clean the test specimen; each sample requires three test specimens.
  • 6.1.2 Pour the uniformly shaken 500mL sample into a beaker, remove bubbles on the sample surface and adjust its temperature to 23℃±3℃; use a hook to vertically immerse the clean test specimen into the sample for 1min, then lift it at a speed of 100mm/min, hang it in a clean place with relative humidity below 70%, temperature 23℃±3℃, no direct sunlight and little ventilation, and drain for 2h.
• 6.2 Place the drained test specimen on the specimen rack of the weathering test machine; separate the test specimen from the base with a piece of 70mm×150mm polyethylene plastic film.

8. Analysis procedure

• 6.3 Adjust the switches of each part of the weathering test machine according to the conditions specified in clause 4.1, start the equipment so that it reaches the specified test conditions within 1h, and record the test start time. Operate continuously under these specified conditions. Start up each day for 23h, then shut down for 1h, so that the test specimen can be taken and loaded during inspection. Test time is calculated as 24h.
• 6.4 Taking out or loading the test specimen for inspection should be carried out during the shutdown period of 1h.
• 6.5 Test operation record
  • a. Neon lamp current;
  • b. Rainfall pressure and distilled water pH value;
  • c. Indicated temperature of the black panel thermometer and working room temperature and humidity;
  • d. Test interruption time and number of times.

9. Qualitative and quantitative determination and calculation formula

• 7 Result judgment
  • 7.1 The test specimen is tested for the specified time; after the period expires, take it out, absorb surface water droplets with industrial filter paper, and visually inspect and record conditions such as cracks and peeling on the illuminated surface.
  • 7.2 Clean the oil film on the surface of the test specimen with petroleum ether and solvent naphtha for rubber industry, dry the illuminated surface, and evaluate the corrosion degree according to SH/T 0217.
• 8 Report: take the average corrosion degree of the three test specimens after the specified test time, round to an integer, and express it as a corrosion grade according to SH/T 0217.
• Calculation formula: not provided in the available source.

10. Precision

not provided in the available source.

11. Report

Take the average corrosion degree of the three test specimens after the specified test time, round to an integer, and express it as a corrosion grade according to SH/T 0217.

12. Referenced documents

• SH 0004 Solvent naphtha for rubber industry
• SH/T 0217 Evaluation method for corrosion degree of test specimens for rust-preventive oils and greases
• SH/T 0218 Preparation method of test specimens for rust-preventive oils and greases
• JIS K 2246-89 weathering test method in clause 5.36 of "Rust-preventive oil" (reference adoption)

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