Ordinary pumps use cast iron or standard steel for wetted parts, suitable only for water or mild fluids. Corrosion-resistant pumps use engineered thermoplastics (PVDF, PP, PEEK), stainless steel alloys, or exotic metals (Hastelloy, titanium) specifically selected to resist chemical attack.

Most corrosion-resistant pumps are centrifugal: an impeller rotates to create centrifugal force, accelerating the fluid outward and generating pressure at the discharge. The impeller and wetted components are made of corrosion-resistant materials to handle aggressive chemicals.

Novice users should:
1) Read the operation manual thoroughly,
2) Understand basic pump components and their functions,
3) Learn proper startup/shutdown procedures,
4) Know the fluid being pumped and its hazards,
5) Recognize abnormal sounds or vibrations,
6) Follow scheduled maintenance checklists.

Classified by:
1) Material (PVDF, PP, stainless steel, Hastelloy),
2) Structure (centrifugal, self-priming, magnetic drive, vertical),
3) Seal type (mechanical seal, magnetic drive, gland packing),
4) Application (chemical transfer, filtration, dosing, wastewater).

Check:
1) Material compatibility with the specific chemical,
2) Temperature rating matches process,
3) Pump curve covers required flow and head,
4) Seal type is appropriate for the application,
5) Motor enclosure suits the environment,
6) Industry certifications are met.

Initial screening steps:
1) Identify fluid chemical composition,
2) Determine pH range,
3) Check operating temperature,
4) Note solid particle content and size,
5) Define required flow and head,
6) Match to pump material compatibility chart.