Why It Matters
Cooling systems mix carbon-steel and yellow-metal (copper/brass/admiralty) components; oxygenated recirculating water corrodes steel and dezincifies/pits copper. Design uses an anodic inhibitor and a cathodic inhibitor for steel plus yellow-metal azoles for copper
Solution Approach
Cooling systems mix carbon-steel and yellow-metal (copper/brass/admiralty) components; oxygenated recirculating water corrodes steel and dezincifies/pits copper. Design uses an anodic inhibitor and a cathodic inhibitor for steel plus yellow-metal azoles for copper 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 Treatment Workflow
1
System Assessment
Characterize operating conditions—fluid composition, temperature, pressure, flow rates—and benchmark current treatment performance.
2
Chemistry Selection
Match base chemicals to your operating envelope. Factor in compatibility with existing programs, regulatory constraints, and downstream impacts.
3
Dosage & Delivery
Determine optimal treat rates through jar testing or field trials. Configure packaging (drums, totes, ISO tanks) to match consumption and storage logistics.
4
Monitoring & Adjustment
Track KPIs—coupon rates, residuals, separator performance, water quality. Adjust chemistry and dosage as conditions change.
Recommended Chemistries (5)
Sodium Molybdate
CAS 7631-95-0
Specialty Additives
Molybdate corrosion inhibitor
Anodic passivator for mild steel; molybdate reinforces the protective gamma-Fe2O3 oxide film and is far less toxic than chromate, working synergistically with zinc
Physical Description: White solid; Colorless crystalline solid Melting Point: 687 °C Solubility: Solubility in water, g/100ml at 100 °C: 84
Full Details
Zinc Nitrate
CAS 7779-88-6
Specialty Additives
Conditioning
1514 (ZINC NITRATE) · Class Cathodic inhibitor; Zn2+ precipitates as Zn(OH)2 at cathodic sites, throttling the oxygen-reduction reaction that drives steel corrosion
Physical Description: Zinc nitrate is a colorless crystalline solid. … Appearance: White powder Melting Point: 36 °C
Full Details
Tolyltriazole (TTA / Methylbenzotriazole)
CAS 29385-43-1
Specialty Additives
Yellow metal protection
Tolyltriazole chemisorbs a Cu-TTA film on copper/brass, stopping dissolution and dezincification; more chlorine-tolerant than benzotriazole
Full Details
Benzotriazole (BTA)
CAS 95-14-7
Specialty Additives
Copper corrosion inhibitor
Benzotriazole forms a tenacious Cu-BTA chelate film that passivates yellow metals and suppresses galvanic copper plating onto steel. (Spine tags Biocidal; the role here is copper corrosion inhibition.)
Melting Point: 98–100 °C Boiling Point: 204 °C at 15 mmHg Density: 1.36 g/cu cm at 20 °C
Full Details
2-Mercaptobenzothiazole (MBT)
CAS 149-30-4
Specialty Additives
Corrosion Inhibition
2811 (2-MERCAPTOBENZOTHIAZOLE) · Class Thiol-bearing azole gives fast initial copper passivation and is often paired with TTA for rapid film establishment on fresh metal
Melting Point: 177–181 °C Boiling Point: Decomposes Density: 1.42 at 20 °C
Full Details