JT/T 1303-2019Supplemental additives for heavy-duty motor vehicle engine coolant (English PDF)

Foreword

This standard is in accordance with GB/T Draft the rules given in 1-2009.

This standard was proposed and managed by the National Technical Committee for Automobile Maintenance Standardization (SAC/TC 247).

This standard was drafted. Highway Research Institute of Ministry of Transport, Beijing Zhonggong Gaoyuan Automobile Test Co., Ltd., Dongfeng Commercial Vehicle Co., Ltd.

Company Technology Center, Uniform Petrochemical Co., Ltd., Zhangjiagang Dick Automobile Chemical Co., Ltd., Tianjin Product Quality Supervision and Testing Technology Institute of Technology.

1 Scope

This standard specifies the technical requirements and test methods, inspection rules, and standards for supplementary additives for engine coolant of heavy-duty vehicles.

And storage requirements.

This standard is applicable to the production, inspection and maintenance of supplementary additives for heavy-duty motor vehicle engine coolants containing nitrite and molybdate components.

use.

2 Normative references

The following documents are essential for the application of this document. For dated references, only the dated version applies to this article Pieces. For undated references, the latest version (including all amendments) applies to this document.

GB/T 6682 Analytical laboratory water specifications and test methods GB/T 8926 Lubricants in use-Determination of insoluble matter GB 2743-2013 Motor vehicle engine coolant JT/T 1230 Determination of inorganic anions in motor vehicle coolants by ion chromatography SH/T 0066 Engine Coolant Foam Tendency Determination Method (Glassware Method) SH/T 007 Determination of Ash Content in Engine Coolants and Rust Preventives SH/T 0069 Engine Antifreeze, Rust Preventive and Coolant PH Determination Method Test method for the effect of chemical solution of cooling system SH/T 0884 on organic coatings on automobiles SH/T 0885 Determination of engine coolant corrosion (glassware method) SH/T 0087 Test Method for Cavitation Corrosion of Engine Coolant Aluminum Pumps SH/T 0888 Engine Coolant Simulation Using Corrosion Test Method SH/T 009 Determination of Alkalinity of Engine Coolant and Rust Preventives Method for determination of corrosion of cast aluminum alloy under heat transfer state of SH/T 0620 engine coolant SH/T 0621 Determination of Chlorine Content in Engine Coolant NB/SH/T 0828 Determination of silicon and other elements in engine coolants Inductively coupled plasma atomic emission Notation

3 Terms and definitions

The following terms and definitions apply to this document.

Supplementary additive for engine coolant of heavy-duty motor vehicles supplemental advances fortune, dueto motor vehicle en coline (SCA) A type that is added to the cooling system of a heavy-duty motor vehicle engine and has the effect of inhibiting cavitation corrosion and reducing hot surface deposits substance.

Note. SCA can be used to supplement the consumption of heavy-duty motor vehicle engine coolant during use, or it can be added to the silicon content is not greater than the 125mg/kg light-duty motor vehicle engine coolant makes it able to meet the requirements of heavy-duty motor vehicle engines.

JT/T 1303-2019

Pre-dose dosage Add the amount of SCA per unit of engine coolant to be added for the first time.

4 Technical requirements and test methods

4.1 Physical and chemical properties SCA according to A. 2. If the test solution is formulated according to the requirements of Table 1, the physical and chemical performance requirements and test methods shall meet the requirements of Table 1.

Table 1 Physical and chemical performance requirements and test methods

project

Claim

Single component >=300 experiment method Nitrite (calculated as NO2) content (mg/kg) >=1.200-JT/T 1230 Nitrite (as NO2) and molybdate (as MoO4) Total (mg/kg)->=780 Single component content (mg/kg)-two components JT/T 1230 NB/SH/T 0828 no pungent odor Ash content (mass fraction) (%) <= 5 SH/T 0067 pH value 7. 5 to 11. 0 SH/T 0069 Reserve Alkalinity (mL) Reported Value SH/T.2009 Chlorine content (mg/kg) <=25 SH/T 0621a JT/T 1230 Silicon content (mg/kg) <= 250 NB/SH/T 0828 no effect on automotive organic coatings SH/T 0884 a In case of dispute, SH/T 0621 is the arbitration method.

4.2 Performance

SCA according to A. 2. If the test solution of 2 is formulated, its performance requirements and test methods shall meet the requirements of Table 2.

Table 2 Performance requirements and test methods

Project Requirements Test Method Glassware corrosion (Low dose) (88 ° C ± 2 ° C, 336h ± 2h) Test piece quality change (mg) Copper-10 ~ + 10 Brass-10 ~ + 10 Steel-10 ~ + 10 Cast iron-10 ~ + 10 Solder-30 to + 30 Cast aluminum-30 to + 30 SH/T 0085 JT/T 1303-2019

Table 2 (continued)

Project Requirements Test Method Glassware corrosion (High dose) (88 ° C ± 2 ° C, 336h ± 2h) Test piece quality change (mg) Copper-10 ~ + 10 Brass-10 ~ + 10 Steel-10 ~ + 10 Cast iron-10 ~ + 10 Solder-30 to + 30 Cast aluminum-30 to + 30 SH/T 0085 Simulate the use of corrosion (88 ° C ± 3 ° C, 1064h ± 2h) Test piece quality change (mg) Copper-20 to + 20 Brass-20 ~ + 20 Steel-20 ~ + 20 Cast iron-20 ~ + 20 Solder-60 ~ + 60 Cast aluminum-60 ~ + 60 SH/T 008 Bubble tendency Foam volume (mL) <=150 Foam disappearing time (s) <=5. 0 SH/T 0066a Heat transfer corrosion of cast aluminum alloy (135 ° C ± 1 ° C, 168h ± 2h) Mass change (mg/cm2)-1. 0 to + 1. 0 SH/T 0620 Cavitation corrosion of aluminum pump (113 ° C ± 1 ° C, 103kPa ± 3kPa, 100h) (level) >=8 SH/T 0087 Compatibility (mL) Reported Values Appendix B a The reference solution for the foam tendency test was prepared according to Appendix B of GB 2743-2013.

5 Inspection rules

5.1 Inspection classification and inspection items

5.1.1 Type inspection Type inspection items are all items specified in Chapter 4.

Type inspection should be carried out in the following cases.

--- When a new product is put into production or the product is typed;

--- When major changes occur in raw materials, processes, etc., which may affect product quality;

--- When the results of the factory inspection or periodic inspection are significantly different from the results of the last type inspection;

--- When the quality supervision and inspection of the relevant national agency fails;

--- When the product is transferred to production or transferred to the factory;

--- Type inspection is carried out every 2 years.

5.1.2 Factory inspection the factory inspection items are part of the inspection items specified in Chapter 4, including. nitrite content, molybdate content, odor, ash content, pH value, reserve alkalinity, chlorine content, silicon content, foam tendency.

JT/T 1303-2019

5.2 batches

Under the condition of unchanged raw materials and processes, each batch of one or more pots is uniformly mixed into one batch.

5.3 sampling

Small packaging products are randomly selected from products with the same production process and production batch. The sampling volume must meet the inspection and sample retention requirements.

6 Marking and storage

6.1 SCA shall mark the packaging in accordance with the following provisions, which shall include.

a) product name;

b) method of use (applicable to the type of engine coolant, pre-dosing, etc.);

c) the name and address of the manufacturer;

d) production date or batch number;

e) Shelf life, etc.

6.2 SCA should be stored in a dark, ventilated place, away from direct sunlight.

JT/T 1303-2019

Appendix A

(Normative appendix) Method for preparing supplementary additive test solution for heavy-duty motor vehicle engine coolant A. 1 reagent A. 1. 1 sodium sulfate (Na2SO4). analytical grade.

A. 1. 2 Sodium chloride (NaCl). analytical grade.

A. 1. 3 Sodium bicarbonate (NaHCO3). analytical grade.

A. 1. 4 Water. meets the third-level water requirements specified in GB/T 6682.

A. 1. 5 Ethylene glycol. analytical grade.

A. 1. 6 Propylene glycol. 1,2 propanediol, analytical grade.

A. 2 Preparation method A. 2. 1 Physical and chemical properties test solution. SCA is prepared by adding water to the pre-dosage ratio recommended by the manufacturer.

A. 2. 2 See Table A for preparation method of performance test solution. 1.

Table A. 1 Preparation method using performance test solution

project

Test solution composition Supplementary additives Glycol (Ethylene glycol or propylene glycol) Corrosive water Glassware corrosion (Low dose) Pre-dosed 50% added 100% (volume fraction) corrosive water (corrosive water consists of per liter of water Add sodium sulfate 148mg, sodium chloride 165mg, sodium bicarbonate 138mg) Glassware corrosion (High dose) Pre-dosed 3 times added 33% (volume fraction) 67% (volume fraction) corrosive water Add sodium sulfate 148mg, sodium chloride 165mg, sodium bicarbonate 138mg) Simulate the use of corrosion by adding a pre-dosed amount of 44% (volume fraction) 56% (volume fraction) corrosive water (corrosive water per liter of water Add sodium sulfate 148mg, sodium chloride 165mg, sodium bicarbonate 138mg) Foam tends to be added at a pre-dosed amount of 33% (volume fraction) 67% (volume fraction) corrosive water Add sodium sulfate 148mg, sodium chloride 165mg, sodium bicarbonate 138mg) Heat transfer corrosion of cast aluminum alloy is added at 25% (volume fraction) according to pre-dosed amount 75% (volume fraction) corrosive water Add sodium chloride 220mg) Aluminium pump cavitation corrosion was added at a pre-dosed amount of 16. 7% (volume fraction) 83. 3% (volume fraction) corrosive water (corrosive water per liter of water Add sodium sulfate 148mg, sodium chloride 165mg, sodium bicarbonate 138mg) A. 2. 3 The prepared test solution shall be used for the test within 96 h.

JT/T 1303-2019

Appendix B

(Normative appendix) Determination of compatibility of supplementary additives for heavy-duty motor vehicle coolants B. 1 Scope this method is suitable for evaluating the compatibility of SCA with the engine coolant to be added.

B. 2 Method summary

SCA is added to the engine coolant to be added according to the pre-dosing ratio to prepare a test solution, and a certain amount of this solution is added to the cone.

The heart tube was kept at 88 ° C for 24h, and the volume of the centrifuged precipitate was measured after cooling to room temperature.

B. 3 Instruments and reagents B. 3. 1 Centrifuge. Meet the requirements in GB/T 8926.

B. 3. 2 Centrifuge tube. It complies with the requirements in GB/T 8926 and is equipped with a cork or rubber stopper.

B. 3. 3 Oven. Can control temperature at 88 °C ± 2 °C.

B. 4 test steps

B. 4. 1 Add SCA to the engine coolant to be added according to the pre-dosing ratio, and mix it to prepare a test solution. Test solution the amount is not less than.200mL.

B. 4. 2 Pour 100mL of test solution into two clean and dry conical centrifuge tubes, stopper the cork or rubber stopper, and place in a constant temperature.

In an oven at 88 ° C ± 2 ° C, keep it for 24h ± 2h.

B. 4. 3 Take out the centrifuge tube and cool to room temperature, and centrifuge for 30 minutes under the condition of relative centrifugal force of 500 according to GB/T 8926.

B. 4. 4 Remove the centrifuge tube and read the volume of the sediment.

B. 5 Results report

Take the arithmetic mean of two repeated determination results as the test result.

JT/T 1303-2019