PULUODY PLD-5096B Copper Strip Corrosion Tester

Overview

The PULUODY PLD-5096B Copper Strip Corrosion Tester is a precision-engineered benchtop instrument designed for quantitative assessment of corrosivity in petroleum products—specifically refined fuels, lubricating oils, and greases—toward copper and silver strips under standardized thermal immersion conditions. It operates on the principle of controlled-temperature immersion testing, where conditioned metal specimens are exposed to test samples in sealed, pressurized test bombs for defined durations (typically 3 hours at 50 °C or 100 °C per GB/T 5096 and ASTM D130). The resulting surface discoloration, tarnish, or pitting is then evaluated visually against standardized ASTM Copper Strip Corrosion Rating Standards (e.g., ASTM D130 Color Chart), providing a semi-quantitative measure of active sulfur compounds, organic acids, and other corrosive species present in hydrocarbon matrices. This method remains foundational in refinery quality control, fuel specification compliance (e.g., ASTM D975, ASTM D3606), and upstream/downstream product release protocols.

Key Features

• Stainless steel constant-temperature bath vessel with corrosion-resistant finish and integrated overflow system to maintain stable liquid level during extended operation.
• Dual-zone heating architecture: primary 1000 W immersion heater for precise thermal regulation, supplemented by an auxiliary 800 W heater to accelerate ramp-up time—reducing pre-conditioning delays without compromising stability.
• Pt100 platinum resistance thermometer (RTD) coupled with digital PID temperature controller ensures ±0.5 °C uniformity across the bath volume, meeting strict repeatability requirements of GB/T 5096 Clause 6.2 and ASTM D130 Section 7.3.
• Integrated reflux condenser system minimizes evaporative loss of bath medium (typically distilled water or silicone oil), ensuring consistent thermal mass and eliminating manual top-up during multi-sample runs.
• Bath lid configured with four precisely spaced ports: two accommodate standard ASTM/GB-compliant test bombs (with pressure-relief valves), while the remaining six support vertical copper strip tube holders—or alternatively, dual silver strip tube assemblies per SH/T 0023.
• All wetted components—including bomb bodies, bomb racks, and tube holders—are fabricated from passivated 304 stainless steel to prevent iron-induced artifacts and ensure long-term dimensional integrity under repeated thermal cycling.

Sample Compatibility & Compliance

The PLD-5096B supports testing of gasoline, diesel, jet fuel (Jet A-1, JP-8), naphthas, kerosene, lubricating base oils, and grease formulations. It fully conforms to the mechanical, thermal, and procedural specifications outlined in GB/T 5096–2017 “Petroleum Products—Copper Strip Corrosion Test”, ASTM D130–22 “Standard Test Method for Corrosiveness to Copper from Petroleum Products by Copper Strip Test”, and SH/T 0023–2021 “Method for Determination of Silver Strip Corrosion of Petroleum Products”. The instrument’s design facilitates GLP-aligned documentation: temperature setpoints, actual bath temperatures, and test duration can be manually logged in accordance with ISO/IEC 17025 traceability requirements. While the unit itself does not include electronic audit trail functionality, its stable thermal performance and mechanical reproducibility support validation under FDA 21 CFR Part 11–governed environments when paired with compliant laboratory notebooks or LIMS-integrated reporting workflows.

Software & Data Management

The PLD-5096B is a hardware-only, analog-digital hybrid system with no embedded firmware or proprietary software interface. Temperature is displayed via a front-panel digital indicator linked directly to the Pt100 sensor output; all operational parameters are manually recorded. This architecture eliminates cybersecurity vulnerabilities, reduces calibration complexity, and ensures compatibility with legacy QA/QC workflows in regulated refineries and third-party testing laboratories. Users may integrate the unit into broader data ecosystems using external USB or RS-232 temperature loggers (e.g., Omega OM-CP series) to capture time-stamped bath temperature profiles for inclusion in electronic batch records or ASTM-compliant test reports.

Applications

• Final product release testing for pipeline-spec diesel and aviation turbine fuel prior to distribution.
• Monitoring sulfur scavenger efficiency in hydrotreating units by comparing feedstock vs. treated product corrosion ratings.
• Evaluation of antioxidant package stability in industrial lubricants subjected to accelerated aging protocols.
• Verification of storage tank integrity—detecting leachable copper ions or acidic degradation products in long-term stored hydrocarbons.
• Supporting root cause analysis in field failures involving fuel system component tarnishing or injector coking.
• Teaching laboratories conducting ASTM D130 methodology training for petroleum engineering and materials science curricula.

FAQ

What standards does the PLD-5096B explicitly support?
GB/T 5096–2017, ASTM D130–22, and SH/T 0023–2021.
Can the unit be used for silver strip testing?
Yes—the bath lid accommodates two full silver strip tube assemblies per SH/T 0023, with dedicated holders and thermal mass optimization for 50 °C/4 h exposure cycles.
Is the temperature controller programmable or fixed-setpoint?
It features a manual setpoint dial with digital readout; no ramp-soak programming or multi-step profiles are supported.
What bath media are recommended?
Distilled water for tests up to 80 °C; silicone oil (e.g., Dow Corning 200 Fluid, 50 cSt) for 100 °C operation per ASTM D130 Annex A1.
Does the unit include test bombs and copper strips?
No—test bombs, copper/silver strips, cleaning kits, and rating charts are supplied separately as consumables per ASTM D130 Section 6.4.