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Date：2025-04-25 16:07:30
Author: DTI
Ding & Testing Inspection: Efficiently Assessing Material Corrosion Rates for Precise Anti-Corrosion Solutions
Linear Polarization Resistance (LPR) measurement is an electrochemical detection technique that rapidly and quantitatively assesses the corrosion rate and corrosion resistance of materials by applying a small linear polarization potential to the material surface and measuring the corresponding current response. Due to its efficiency and non-destructive nature, LPR measurement is widely used in material corrosion research and industrial anti-corrosion fields.
Service Introduction
LPR measurement is a high-precision corrosion assessment method. By applying a small linear polarization potential (typically ±10 mV) to the material surface and measuring the current response in a corrosive medium, the corrosion rate of the material can be quickly calculated. According to Ohm's law, the polarization resistance (Rp) is inversely proportional to the corrosion current density (Icorr), providing rapid quantitative corrosion data for material selection, corrosion prevention design, and process optimization.
Testing Methods
LPR measurement uses advanced electrochemical workstations, combined with laboratory simulation and data analysis, to ensure accurate and reliable results. Common testing methods include:
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Micro-Polarization Measurement: Applying a small linear polarization potential (±10 mV) to the material surface and measuring the corresponding current response.
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Polarization Resistance Calculation: Calculating the polarization resistance (Rp) by measuring the slope of the current versus potential.
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Corrosion Current Density Calculation: Using the Stern-Geary equation, combining the polarization resistance (Rp) and electrochemical parameters of the material (such as exchange current density) to calculate the corrosion current density (Icorr).
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Corrosion Rate Assessment: Calculating the corrosion rate of the material based on the corrosion current density (Icorr) and the material's density.
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Real-Time Monitoring and Data Analysis: Continuously measuring LPR to monitor changes in the corrosion rate of the material in the corrosive medium over time.
Industry Pain Points
In practical applications, materials and equipment often face complex corrosive environments, such as marine, industrial, and acidic conditions. Corrosion not only reduces the service life of materials but can also lead to structural failure and safety hazards. Traditional corrosion detection methods typically provide qualitative analysis and are unable to monitor the corrosion process in real-time or quantitatively assess the corrosion rate. Therefore, developing a detection technology that can quickly and quantitatively monitor corrosion behavior is crucial.
Service Scope
Ding & Testing Inspection's LPR measurement services cover a wide range, including:
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Metal materials (e.g., carbon steel, stainless steel, aluminum alloy, copper alloy)
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Corrosion-resistant coatings (e.g., paint coatings, electroplating layers, anodized films)
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Industrial equipment (e.g., pipelines, storage tanks, reactors)
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Marine engineering facilities
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Aerospace and automotive components
Application Fields
Our LPR measurement services are widely applied in:
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Aerospace
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Automotive manufacturing
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Marine engineering
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Chemical industry
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Construction engineering
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Electronics and electrical appliances
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Energy sector
Testing Standards
LPR measurement strictly adheres to international and domestic standards, such as:
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ASTM G59-97(2015): Standard test method for pitting resistance of metals
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GB/T 31706-2015: Method for corrosion testing of metals and alloys - Electrochemical impedance spectroscopy
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ISO 16773-1:2017: Corrosion of metals and alloys - Electrochemical impedance spectroscopy - Part 1: General guidelines
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GB/T 10125-2021: Salt spray testing for artificial atmosphere corrosion testing
What We Offer
Through these standards, we address:
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Rapid, quantitative assessment of material corrosion rates and corrosion resistance
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Real-time monitoring of material corrosion behavior in corrosive media
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Revelation of corrosion mechanisms for anti-corrosion measures
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Evaluation of protective coating integrity
By choosing Ding & Testing Inspection, you will receive:
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Professional testing services with advanced electrochemical equipment and a skilled technical team for precise material corrosion behavior assessment.
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Quantitative corrosion analysis through electrochemical parameter measurement, providing corrosion rate and resistance evaluations.
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Customized solutions with targeted anti-corrosion measures and improvement suggestions based on test results.
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Compliance with international standards like ASTM, GB, and ISO.
Contact Us
Contact Ding & Testing Inspection to let our experts provide top-tier solutions for your metal material corrosion issues. We offer exceptional service for both technical consultation and on-site testing.
About Ding & Testing Inspection
Founded by industry veterans, Ding & Testing Inspection adheres to international standards (ISO/ASTM/ASME/JIS/GB/EN/API) for testing, appraisal, and evaluation. With a world-class corrosion lab, we've gained recognition from top clients in various sectors. Our reputation and client satisfaction are solid in corrosion, material failure analysis, and energy material inspection.
Get Your Free Testing Plans and Quotation
Ask professional engineers for on-line service, and receive testing proposals within 2 hours.
Six Reasons to choose DTI
Complete qualifications
Complete range of qualification certificatesDTI has CMA, CNAS and other qualifications, including China's domestic and global relatively comprehensive leading qualifications at metal materials and corrosion test field. We can provide authoritative reports of national standard and industrial standard.
Viewing CertificatesProfessional team
70% professional and technical personnelDTI has a professional testing team, with 70% of professional technicians and 70% of undergraduate degree or above. From drafting proposals to sample analysis issuance, we are professional at each step to ensure the precision.
Learn MoreAdvanced Equipment
400 units with a 92% import ratioDTI has invested affluent budgets onto 450 sets of advanced large and medium-sized testing equipment. 92% of the equipment are imported from U.S., Germany, Switzerland, installed at scores of labs cover an area of 8,000 m2 and services cover 1000+ segments.
For DetailsAccurate Data
The accuracy rate of the inspection reaches 99%our professional technical testing team, advanced equipment, large number of databases, and solid implementation of lab quality control, DTI guarantees the overall accuracy rate of the reliable analysis data up to 99%.
consult NowComprehensive Service
One-stop tracking serviceDTI services cover the whole industries and provides the optimal solutions and technical support in terms of cycle time,cost-saving and qualifications based on numerous indicators, E2E supply chain solutions, all-round multi-dimensional product analysis.
Learn MoreCustomer Service
Regular return visits can be re-examinedDTI 24h*7 service (China) is available so that you could reach us anytime, anywhere. We also have an Emergency Service Access in case of special circumstance. DTI visits their customers regularly, and the questionable items in issued reports can be redone free of charge.
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Issues You May Care About
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A. DTI has a comprehensive range of instruments and equipment, as well as numerous engineers with over 10 years of experience.
B. We offer consultative services with a broad industry scope, tailoring solutions to meet customer needs.
C. We provide one-stop technical services in the environmental field, with dedicated personnel throughout the process, allowing customers to stay informed about the progress of their reports in real time.
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A. Normally, we will issue a report within 5-7 working days after receiving the samples.
B. To expedite the report issuance and eliminate extensive manual processing steps, DTI employs collaborative efforts across multiple departments and utilizes automated sample handling technology for certain types of samples, making the reports faster and more accurate.
C. For clients who urgently need the report, expedited services are available.
D. The report issuance time varies depending on the specific type of product, and you can consult with our online customer service for details.
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DTI’s test data obtained from experiments are all true and valid, and will not maliciously alter or forge test data. The test reports issued by DTI are authoritative and credible and are recognized both in China and other countries.
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The specific standards vary depending on the testing items. Please consult online customer service for details.
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Our company promises that all test data obtained from the experiment are true and valid, and will not maliciously alter or falsify the test data. If any customer has any questions about the test data obtained from the experiment, please contact our technical staff, and our company will conduct a free re-inspection for the customer. If the data obtained after the replicated test are the same as the results of the initial test, our company will not change the test results. If they are different from the results of the initial test, our company will conduct multiple experiments on the samples during this period, and finally determine the results. Stable experimental data is used as the final test result.
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Due to the large amount of standard information and other reasons, many customers may not know what items need to be tested. In this case, we could provide customers with recommendations for related projects, but the customers are required to provide the following information:
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Special Equipment Product Testing Solutions
LEARN ABOUT DING TESTING & INSPECTION
DTI has served thousands of entities, including numbers of Fortune Global 500 enterprises. DTI always conveys trustfulness to the quality life ubiquitously.
DTI is devotional on providing services for metal comprehensive testing. Among the testing services, DTI has more advantage at implementation of various corrosion resistance tests for different type of materials. The range of testing capability includes the analysis of metal composition and metal metallographic, mechanical performance and metal corrosion resistance testing, failure analysis, R & D analysis, and product quality assessment etc.
DTI has been awarded the conformity of assessment from ISO/IEC17025, ISO9001, GB/T28001/OHSAS18001, GB/T14001/ISO14001, CNAS and CMA Certification.
- 30
Industrial Fields
- 200Nos.
Large Equipment
- 3000㎡
Lab Area Size
- 1000Nos.
Customers Served
To be an influential, authoritative, third-party testing organization in China.
We provide professional inspection, testing, analysis for upstream and downstream supply chain of various industries, which covers industrial manufacturing, chemicals, offshore engineering, oil & gas, wind power, hydrogen energy, nuclear power, automotive structures, metals and minerals, equipment manufacturing, construction machinery, aerospace, etc.
We are committed to providing impartial, fair, accurate, and timely professional testing services nearly 20 provinces in China.
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