GB/T 42436-2023 (English Version)

Standard No.: GB/T 42436-2023
Language: Chinese, Available in English version
Release Date: 2023
Published By: General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
Latest: GB/T 42436-2023

Scope: This document specifies the technical requirements, test methods, inspection rules, as well as marking, packaging, transportation, storage and safety of M100 automotive methanol fuel additives. This document applies to the production and inspection of M100 automotive methanol fuel additives.

Introduction

Analysis of the core technical requirements of the standard

Key indicators	Technical requirements	Test methods	Technical significance
Sulfur content	≤50 mg/kg	GB/T 11140	Control exhaust pollutant emissions
Rust resistance	≤Mild rust	Appendix A Aluminum sheet test	Ensure the anti-corrosion performance of the fuel system
Nozzle cleanliness	Flow rate change ≤ 4%	Appendix B bench test	Maintain fuel injection accuracy

Technology evolution and standard formulation background

This standard is based on the experience of pilot demonstration of methanol vehicles in my country. It systematically regulates the additive performance index system for the first time to address the unique corrosion and cold start problems of M100 methanol fuel. Compared with traditional gasoline additives, it particularly strengthens the requirements for metal corrosion inhibition (Appendix A) and combustion deposit control (Appendix B).

Detailed explanation of key test methods

Aluminum sheet anti-rust test (Appendix A)

A LY12 aluminum alloy sheet was immersed in a methanol-formic acid-water mixture at 38°C for 15 hours, and the anti-corrosion performance was evaluated by rust degree classification. Typical application cases show that qualified additives can extend the life of aluminum fuel rails by more than 3 times.

Engine bench test (Appendix B)

Test parameters	Working condition 1	Working condition 2
Speed (r/min)	5600±50	4200±50
Duration (min)	20	10

The 120-hour cycle test includes 240 working condition cycles, which strictly simulates actual driving conditions and comprehensively evaluates the performance of the additive through 7 indicators such as the flow rate change rate of the solenoid valve injector.

Implementation recommendations and industry impact

Manufacturers need to focus on:

Establish a full-process quality traceability system, especially for sensitive indicators such as sulfur and phosphorus
Equip a nozzle flow test bench that meets the requirements of GB/T 25363
Improve the rapid detection capability of rust prevention (Appendix A simplified method)

The implementation of this standard will promote the upgrading of methanol fuel additive technology, and it is expected to reduce the nozzle carbon deposition problem by more than 40%.

GB/T 42436-2023 Referenced Document

GB/T 11140 Standard test method for sulfur in petroleum products by wavelength dispersive X-ray fluorescence spectrometry
GB/T 16483 Safety data sheet for chemical products.Content and order of sections
GB/T 17476 Determination of Multiple Elements in Lubricating Oils and Base Oils by Inductively Coupled Plasma Emission Spectrometry
GB/T 191 Packaging.Pictorial marking for handling of goods
GB/T 25363 Electromechanical solenoid fuel injector assemblies of gasoline engines.Testing methods
GB/T 261 Determination of flash point—Pensky-Martens closed cup method
GB/T 3190 Chemical composition of wrought aluminium and aluminium alloys
GB/T 338-2011 Methanol for industrial use
GB/T 3535 Petroleum products.Determination of pour point
GB/T 37322 Test method for evaluating gasoline cleanliness—Simulation test of intake valve deposit (IVD) of gasoline engine
GB/T 42416 M100 vehicle methanol fuel
GB/T 4756 Method for manual sampling of petroleum liquids
GB/T 508 Petroleum products--Determination of ash
GB/T 511 Petroleum,petroleum products and additives.Method for determination of machanical admixtures
GB/T 514 Specification for liquid-in-glass thermometers for testing of petroleum products
GB/T 6324.9 Test method of organic chemical products—Part 9: Determination of chloride
GB/T 6682 Water for analytical laboratory use.Specification and test methods
GB/T 7304 Standard test method for acid number of petroleum products by potentiometric titration
GB/T 8170 Rules of rounding off for numerical values & expression and judgement of limiting values
NB/SH/T 0164 Rules for packaging, storage, transportation and delivery acceptance of petroleum and related products
NB/SH/T 0704 Standard test method for nitrogen in petroleum and petroleum products by boat-inlet chemiluminescence
NB/SH/T 0842 Determination of Sulfur Content in Light Liquid Fuels by Single Wavelength Dispersive X-ray Fluorescence Spectrometry
SH/T 0020 Determination of phosphorus content in gasoline (spectrophotometry)
SH/T 0251 Determination of Base Number of Petroleum Products (Perchloric Acid Potentiometric Titration Method)

GB/T 42436-2023 history

2023 GB/T 42436-2023 M100 methanol fuel additive for vehicles