| 摘要 |
<p>A mixture of CaSO3 and bentonite, where the bentonite contains a substantial amount of alkaline earth metal bentonite, e.g., Ca-bentonite, is useful as a backfill composition for underground magnesium galvanic anodes. The backfill may optionally, and beneficially, contain at least one compound selected from sodium sulfite, boric acid, sodium alkylates or sodium-dialkyldithiocarbamates.</p> |
