Generally speaking there are two different types of lead acid battery, Starting and Deep Cycle. If a starting battery is routinely deep cycled (discharged below 20%-50% of max capacity) it will generally fail after 30-150 cycles. The same starting battery will last for thousands of cycles if it is just used normally (2% - 5% discharge).
These phosphates precipitate the solids to the bottom of the boiler drum. At the bottom of the boiler drum there is a bottom blow to remove these solids. These chemicals also include anti-scaling agents, oxygen scavengers, and anti-foaming agents.
Boiler water must contain a certain amount of causticity (i.e. Hydroxide alkalinity in order to. accomplish three things: 1. To maintain a protective coating of iron oxide over the. metal and thereby prevent certain types of corrosion. 2. To provide a proper environment for precipitation of. desirable sludge materials.