Corrosion inside pump cylinders
Corrosion inside pump cylinders
(OP)
I have the challenge of eliminating a corrosion problem in a grout pump cylinder. The current cylinder construction is quite basic. Low carbon steel (1012 or 1018) that is machined and heat treated. Heat treat process consists of a gas nitriding type process followed by oil quenching. This process is proprietary to my heat treat vendor. They call "Lindure" process. It is not providing sufficient corrosion resistance this product requires. In fact, the currrent process will allow significant pitting of the cylinder ID if simple tap water is allowed to sit inside the cylinder. Need to find a better, more corrosion resistant process. The cylinder is not subjected to high structrual loads. I simply need a process that gives high surface wear on the ID along with good corrosion resistance to water.
Thanks in advance for your expert opinions.
NILCRAM
Thanks in advance for your expert opinions.
NILCRAM





RE: Corrosion inside pump cylinders
As you probably do not need hardness,
maybe that coatings of teflon, Sermetel W (http://www.sermatech.com/about/history.html)
or Magnaplate (www.magnaplate.com/)
would be more effective.
Regards,
http://www.welding-advisers.com/
RE: Corrosion inside pump cylinders
EN is part phosphorus and is available in a limited range of phosphorus content. The phosporous content affects the hardness as does the heat treatement of EN. Hard is good for wear.
RE: Corrosion inside pump cylinders
RE: Corrosion inside pump cylinders
RE: Corrosion inside pump cylinders
Chrome plating may become much more expensive come February. OSHA is considering reducing the PEL for chromium from 50 ug/cu meter to 1 ug/cu meter and the ruling should be out then. They do actually use chromium in chrome plating don't they?