SDM 1440 Copper and Silver Corrosion Tester

Overview

The SDM 1440 Copper and Silver Corrosion Tester is a precision-engineered laboratory instrument designed for the standardized evaluation of corrosive tendencies of petroleum products—particularly gasoline, diesel fuels, jet fuels, and lubricating oils—toward copper and silver strips. It operates on the principle of controlled immersion corrosion testing, where polished metal test strips are exposed to heated fuel samples under defined thermal and atmospheric conditions for specified durations. The instrument replicates accelerated aging environments in accordance with internationally recognized test methods, enabling quantitative assessment of sulfur-containing compounds, organic acids, peroxides, and other reactive species that induce tarnishing or pitting. Its robust stainless-steel construction, thermally stable bath design, and integrated safety monitoring systems ensure repeatable, GLP-compliant execution of corrosion protocols across quality control, refinery R&D, and third-party certification laboratories.

Key Features

• Full stainless-steel construction—including bath vessel, heater housing, cooling coil, and support rack—ensures long-term resistance to chemical degradation and facilitates rigorous cleaning between tests.
• PID temperature controller with high-accuracy PT100A platinum resistance sensor delivers precise thermal regulation from ambient up to 150 °C, maintaining stability within ±0.1 °C over extended test cycles.
• Integrated overtemperature protection and low-bath-level alarm system provide fail-safe operation, minimizing risk of dry-heating damage or uncontrolled thermal excursion.
• Electrically driven magnetic stirrer ensures uniform heat distribution and consistent fluid dynamics throughout the 26 L bath volume, critical for reproducible strip exposure conditions.
• Double-wall insulated bath structure reduces external heat loss and improves energy efficiency while maintaining operator safety during prolonged operation.
• Pyramid-shaped bath cover minimizes vapor condensation and prevents contamination of test strips; accommodates four pressurized test vessels simultaneously for parallel sample analysis.

Sample Compatibility & Compliance

The SDM 1440 is validated for use with all petroleum distillates and middle distillate fuels requiring copper strip corrosion (CSC) or silver strip corrosion (SSC) evaluation. It supports both open-bath and sealed-vessel configurations as required by ASTM D130 (copper strip), IP 154 (copper strip), ISO 2160 (copper strip), ISO 22160 (silver strip), and related specifications. Its design conforms to mechanical and procedural requirements outlined in ASTM D4814 (gasoline specification), ASTM D7667 (ultra-low-sulfur diesel), ASTM D7671 (biodiesel blends), and IP 227 (corrosion testing of aviation turbine fuels). All operational parameters—including thermal ramp rate, hold time accuracy, and strip immersion depth—are traceable to NIST-calibrated references and documented for audit readiness under ISO/IEC 17025 and FDA 21 CFR Part 11–compatible data management workflows.

Software & Data Management

While the SDM 1440 operates via dedicated hardware-based PID control without embedded software, its analog output signals (e.g., PT100A voltage, relay status) are compatible with external data acquisition systems supporting Modbus RTU or 4–20 mA interfaces. Laboratories implementing electronic lab notebooks (ELN) or LIMS platforms can integrate real-time temperature logging, alarm event timestamps, and operator-initiated test start/stop markers via optional I/O modules. Audit trails—including setpoint changes, alarm activations, and power cycle history—are retained through external recording devices compliant with GLP/GMP documentation standards. Calibration certificates for the PT100A sensor and temperature verification reports are provided upon installation and recommended annually per ISO/IEC 17025 Clause 6.5.

Applications

• Quality assurance of finished gasoline and diesel fuels prior to dispatch, verifying compliance with regional sulfur and corrosivity limits (e.g., Euro 5/6, EPA Tier 3).
• Routine screening of biofuel blends (FAME, HVO, renewable diesel) for latent oxidative instability and metallic leaching potential.
• Refinery process troubleshooting—identifying upstream desulfurization inefficiencies or storage tank contamination events through accelerated strip discoloration patterns.
• Supporting ASTM D3241 (jet fuel thermal oxidation stability) pre-screening by evaluating copper-catalyzed degradation pathways.
• Contract testing laboratories performing accredited corrosion assessments for OEM fuel approval programs (e.g., Airbus AIMS, Boeing D6-17487).

FAQ

What standards does the SDM 1440 fully support?
ASTM D130, IP 154, ISO 2160, ISO 22160, DIN 51759, ASTM D4814, ASTM D7667, ASTM D7671, and IP 227—all verified through factory performance qualification using certified reference materials.
Can the instrument be used for silver strip testing only?
Yes. The bath geometry, temperature uniformity, and vessel rack accommodate both copper and silver test strips per ISO 22160 and IP 227; no hardware modification is required.
Is external cooling water required for operation?
No. The integrated stainless-steel cooling coil is designed for connection to facility-supplied chilled water (5–25 °C) or recirculating chiller systems; air-cooled alternatives are not supported.
How is temperature calibration verified?
Calibration is performed using a NIST-traceable portable dry-block calibrator or liquid-bath reference thermometer; SDM provides a certified calibration report at shipment and recommends annual verification.
Does the unit include test strips or pressure vessels?
No. Copper and silver test strips (ASTM D130 Grade 1, ISO 22160 Class 1) and ASTM-compliant glass or stainless-steel pressure vessels must be procured separately per test method requirements.