Now, most boaters refer to sacrificial anodes as âzincs,â because zinc has been used for a long time. But there are other âzincsâ made of aluminum, magnesium and various alloys with various trade names.n a hypothetical situation where zinc would last 150 days, magnesium would last but 50 days, while an aluminum anode would have corrosion lined up at the chow line for 225 days.
Although water is also incompressible but it is usually considered a contaminant rather than a hydraulic fluid in systems, but recently students of Purdue university claim to have built a small lawn mower which uses only water in all its hydraulic systems.
1 Soft water is less than 1 gpg, whereas hard water is about 7 gpg or higher. You can check your water for free with a quick test.  Parts per million: While less likely, you may also find hardness measured in parts per million (ppm) when shopping for a softener. One gpg is equivalent to 17.1 ppm.