Why It Matters
Finishing shops blacken steel parts (tools, fasteners, machine components) for mild corrosion resistance and cosmetics, buying hot black-oxide salt blends by the drum. Core caustic and nitrite chemistry is
Solution Approach
Finishing shops blacken steel parts (tools, fasteners, machine components) for mild corrosion resistance and cosmetics, buying hot black-oxide salt blends by the drum. Core caustic and nitrite chemistry is 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 (3)
Caustic Soda (Sodium Hydroxide) Beads
CAS 1310-73-2
Acids & Salts
Primary alkali for industrial cleaning
1824 (SODIUM HYDROXIDE SOLUTION) · Class Sodium hydroxide forms the hot oxidizing bath that converts the steel surface to black magnetite (Fe3O4); in catalog
Melting Point: 318 °C Boiling Point: > 130 °C at 760 mmHg Density: 1.5 at 20 °C
Full Details
Sodium Nitrite (FCC), Food Grade
CAS 7632-00-0
Specialty Additives
Ferrous metal corrosion inhibitor
1500 (SODIUM NITRITE) · Class Oxidizer in the hot black-oxide salt bath that drives magnetite formation; in catalog
Melting Point: 271 °C Boiling Point: Decomposes at 320 °C Density: 2.17 at 20 °C
Full Details
Sodium nitrate
CAS 7631-99-4
Acids & Salts
Conditioning
1498 (SODIUM NITRATE) · Class Co-oxidizer and bath temperature modifier in the black-oxide salt blend
Melting Point: 307 °C Boiling Point: Decomposes 380 °C Density: 2.26 at 20 °C
Full Details
Related Product Families
● Available
Corrosion Inhibitors
Benzotriazole, sodium nitrite, molybdate, and specialty inhibitors for ferrous and non-ferrous metal protection
Corrosion Inhibition
7 chemistries
View family
● Available
Alkaline Cleaning Chemicals
Caustic soda, silicates, and acids for industrial parts cleaning, descaling, and surface activation
CleaningpH Adjustment
10 chemistries
View family