Boiler Corrosion Control
Contents
Basics
- Given Steam Boilers for Steam Engines / Steam Turbines are pressure vessels that must operate at or above the Working Pressure of the engine/turbine, any defect or failure caused by corrosion can cause catastrophic results
- Thus preventing corrosion in a steam system is paramount
- Even moreso when using Dry Steam
- This is also Relevant for Saturated Water
Methods
- Similar to Corrosion Prevention methods in general, but below is some information more specific to the Boilermaker
Coatings
Chapter 11 Preboiler And Boiler Corrosion Control
from Andrew Smart:
You don't need stainless steel, just some steel appropriate for boilers. You'd want to do magnetite passivation (black oxide) to prevent corrosion on the inside as is done with boilers. If appropriate water is used (slightly basic pH and no oxygen) then corrosion of the magnetite layer won't occur, but otherwise you'd want a maintenance procedure to restore/maximize the thickness of the magnetite layer (essentially add chemicals and heat into the loop every year or so). I have ideas here but hadn't done anything myself yet.
Boiler Feedwater Treatment
- Filtration of and/or PH Control of the Water is Typically Done (Need to see if full on Deionized water is used, or if that is cost prohibitive/loses effectiveness overtime thus necessitating BFWT)
- A PH Sensor and Water Electrical Conductivity Sensor are some of the main sensors used
