Single-face electrogalvanized, chromium-free surface treated steel plate for fuel tank and surface treatment agent
US10301736B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 14, 2014 |
| Grant date | May 28, 2019 |
| Priority date | — |
| Expiry date | Dec 30, 2035 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/12535
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
The invention relates to an inorganic aqueous surface treatment agent for a single-face electrogalvanized, chromium free surface treated steel plate, a single-face electrogalvanized, chromium-free surface treated steel plate used for fuel tanks and a process of making the same. The inorganic aqueous surface treatment agent for a single-face electrogalvanized, chromium free surface treated steel plate comprises the following components: one or more metallic ion compounds comprising at least one of Zn2+, Mn2+, Mg2+, Ni2+, Al3+ and Ca2+; one or more vanadium compounds comprising at least one of V4+ and V5+; one or more compounds comprising at least one of phosphoric acid, pyrophosphoric acid, metaphosphoric acid, organic phosphoric acid and the ammonium salts thereof; one or more fluoric acid compounds comprising at least one of Zr, Ti, Si and Ha; one or more silane coupling agents comprising at least one of vinyl silane coupling agent, amino silane coupling agent, epoxy silane coupling agent and acryloxy silane coupling agent; a silica sol having a particle diameter less than 100 nm; one or more surfactants comprising at least one of carboxylate, sulfuric acid ester salt, sulfonate a…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.