A Study of Extension of Engine Coolant Life Using Low Phosphate Organic Acid Inhibitors HONDA R&D Company, Limited Tochigi R&D Center

Format:

Book

Conference/Event

Author/Creator:

Osawa, Mitsuru, author.

Conference Name:

2003 JSAE/SAE International Spring Fuels and Lubricants Meeting (2003-05-19 : Yokohama, Japan)

Language:

English

Physical Description:

1 online resource cm

Place of Publication:

Warrendale, PA SAE International 2003

Summary:

A prescription was developed for a long-life engine coolant that included certain amounts of added organic carboxylate inhibitors and inorganic acid inhibitors, showed zero blackening of aluminum, and lowered effect on cooling system components and materials. A method of judging coolant life was also developed.As a reference, non-phosphate organic acid type coolant (NP-OAT coolant) was also investigated, but because degradation in erosion-corrosion toughness accompanying aluminum blackening was found, it was necessary to add inorganic acid inhibitors including phosphate inhibitors. Also, the cause of the erosion-corrosion was judged to be amorphous corrosion by-products from aluminum blackening at high temperatures due to non-phosphate organic acid inhibitors, according to a comparison analysis of these with phosphate-type inhibitors.A catalytic process for heat-oxidation degradation of coolants was developed and established to correlate with aging in market vehicles. This can be used to estimate the lifetime of anti-corrosion performance of coolants in the laboratory

Notes:

Vendor supplied data

Publisher Number:

2003-01-2023

Access Restriction:

Restricted for use by site license