Why It Matters
Ferrous and non-ferrous parts flash-rust or tarnish in-process and during interim storage; design calls for ferrous and yellow-metal corrosion inhibitors
Solution Approach
Ferrous and non-ferrous parts flash-rust or tarnish in-process and during interim storage; design calls for ferrous and yellow-metal corrosion inhibitors RawSource supplies the base chemicals that go into these programs. We can help with product selection, grade matching, and sourcing from multiple origins for supply security.
Typical Selection Workflow
1
Process & Requirement Definition
Map the unit operation and define the functional, purity, and regulatory requirements the chemical input must meet.
2
Chemistry & Grade Selection
Match the solvent, intermediate, acid or base, catalyst, or specialty additive to the process and downstream compatibility.
3
Trial & Specification
Validate performance at bench or pilot scale, and set the grade, treat rate, and packaging to match throughput and handling.
4
Quality & Supply Assurance
Lock the spec with a CoA and secure multi-origin sourcing for supply resilience and consistent lot quality.
Recommended Chemistries (5)
Sodium Molybdate
CAS 7631-95-0
Specialty Additives
Non-toxic corrosion inhibitor for closed systems
Anodic inhibitor that forms an insoluble ferric-molybdate passivation layer on steel; low-toxicity nitrite replacement for closed coolant systems
Physical Description: White solid; Colorless crystalline solid Melting Point: 687 °C Solubility: Solubility in water, g/100ml at 100 °C: 84
Full Details
Benzotriazole (BTA)
CAS 95-14-7
Specialty Additives
Copper and yellow metal corrosion inhibitor
Chemisorbs onto copper and brass to build a Cu-BTA monolayer that blocks oxygen access, stopping tarnish on non-ferrous machined components
Melting Point: 98–100 °C Boiling Point: 204 °C at 15 mmHg Density: 1.36 g/cu cm at 20 °C
Full Details
Tolyltriazole (TTA / Methylbenzotriazole)
CAS 29385-43-1
Specialty Additives
Preservation
Methyl (tolyl) triazole gives the same copper-passivating film as BTA with better solubility and persistence in alkaline coolants
Full Details
2-Mercaptobenzothiazole (MBT)
CAS 149-30-4
Specialty Additives
Corrosion Inhibition
2811 (2-MERCAPTOBENZOTHIAZOLE) · Class Thiazole that chemisorbs through its sulfur onto copper and brass to form a protective film; primarily a yellow-metal inhibitor for soluble-oil systems, paired with nitrite/molybdate when steel must also be protected
Melting Point: 177–181 °C Boiling Point: Decomposes Density: 1.42 at 20 °C
Full Details
Sodium Nitrite (FCC), Food Grade
CAS 7632-00-0
Specialty Additives
Ferrous metal corrosion inhibitor
1500 (SODIUM NITRITE) · Class Strong anodic passivator for steel - oxidizes the metal surface to a protective gamma-Fe2O3 film, the traditional ferrous MWF inhibitor
Melting Point: 271 °C Boiling Point: Decomposes at 320 °C Density: 2.17 at 20 °C
Full Details