Corrosion Testing Instruments & Accessories

We are pleased to introduce latest designed, user friendly, economical range of SSC Temperature Pressure Vessels to test and accurately determine the sulfide stress cracking susceptibility of metals in H₂S service. These are provided with ready conversion chart that can accurately determine specimen load. It also gives sustained specimen load under a stress state of uniaxial tension. Our products are supplied with dial Indicator providing a check for deflection.

SSC Temperature Pressure Vessels are fabricated from precision-machined steel and are suitable to test full size specimens of 0.252’ (6.40mm) (7/16" - 20 thread). Tensile load on these vessels can be achieved quickly and adjusted easily using a workshop wrench on the tension-adjusting screw and lock nut. A thrust bearing distributes the load and prevents seizure. This product is fitted with quick changeover accessories to effectively meet the user's needs. Samples are stressed in a single operation quickly and seals connected to sample resist leakage and avoid galvanic corrosion with test vessel.

We are one of the leading manufacturers of Cathodic Disbonding (CD) tester, which is designed to test and accurately determine the characteristics of insulating coating systems applied over steel material. The purpose of coating system is to prevent corrosion that could occur in the underground pipeline services. These underground pipes are coated and cathodically protected. Applied cathodic protection potentials may cause loosening of the coating, beginning at holiday edges. Such potentials can cause spontaneous holidays. Test method provides accelerated conditions for cathodic disbondment to occur and provides a measure of resistance of coatings to this type of action. Cathodic disbondment tester is used in civil engineering for evaluation of epoxy coated rebars to evaluate effect of cathodic protection on epoxy-coated reba.

Our company holds expertise in manufacturing and exporting wide assortment of Corrosion Coupons that accurately determine the corrosion of metals in various service conditions. Corrosion coupons are produced in number of sizes, shapes, and material as per customer needs. These coupons meet NACE Standard requirements and tested before shipment. We supply these products in VCI Bags for excellent storage of ferrous and non- ferrous coupons. These bags generally protect material for up to 1 year under proper environment conditions.

We always take care of proper cleaning procedures as given in ASTM-G1, NACE Standards. A proper record of initial weights, exposure dates, exposure time, and location for each sample is maintained. This information is also provided on VCI Bag. Each coupon is pre-weighted before the dispatch of the shipment.

Technical Assistance: Our Technician and experts can provide technical assistance at the request of customers.

Use of corrosion coupon has several advantages that are listed as below:

• No corrosion coupon replacement during the evaluation
• No maintenance requirements
• No timetable to accommodate
• Can be used for all pipes at all flows
• No electrical requirements
• No flow rates to maintain or required
• No equalization period required
• No big coupon assemblies to install
• No big coupon assemblies to install
• For Further details, please contact us

We offer our clients 4-Point Bending SSC test jigs that accurately determine the stress corrosion cracking susceptibility of metals in H2S service. Test rigs meet the requirements of ASTM / NACE Standard TM-0177 and are suitable to test material as per requirements of NACE MR0175. Main objective of this test is to evaluate materials for the service behavior or to screen alloys for service in a specific severe environment for an accelerated time. The 4-point bend SSC test is performed using ASTM G-39 and NACE TM0177 standards.

Each assembly is provided with ready to use connections fittings. Test rig is designed to accurately determine specimen stress requirements. Test specimen size 5mm-6mm, width 15-25mm, and with length of 150mm is suitable for testing 4-point bending specimens. Stress corrosion specimen is smoothly machined before putting in the test jig.

Four point bend test jig comes with digital deflection meter attachment to measure accurate deflection. 4-point bend test jigs are manufactured using precision-machined stainless steel with high accuracy. Stress level can be easily adjusted using a workshop wrench on the tension-adjusting screw and lock nut. It provides a uniform tensile stress over a relatively large area of the specimen

Test vessel with standard environment chamber is machined from clear, durable perspect / acrylic to permit instant visual observation of the specimen at all times. Glass with acrylic vessels is also available at option of user. O-ring seals are provided to prevent any leakages from test vessel. Individual test vessels are tested with Hydrotest of air before dispatch. At a time maximum 8-10 sets of samples can be tested. This depends on thickness of material.

In the test vessel, solution of sodium chloride, acetic acid or synthetic ocean sea water as per ASTM D1141 is used with known pH. Samples are stressed as per ASTM G39 specifications and immersed in the solution for the test period. At the end of the test, samples are evaluated for cracks using magnetic particle inspection or standard metallographic test and pH of the test solution.

Backed by the latest technology, we bring forth Hydrogen Induced Cracking Testing apparatus (HIC test) to test and accurately determine the hydrogen induced cracking over exposed test specimens as per NACE standards requirements. HIC testing is recommended to evaluate the resistance of pipeline and pressure vessel plate steels to hydrogen induced cracking corrosion caused by hydrogen absorption from aqueous sulfide corrosion. Unstressed test specimens are exposed to a solution at temperature of 25deg cent with continuous H2S gas flow. The test specimens are finally removed and evaluated. Test specimens determine susceptibility of metals in H₂S service. HIC testing apparatus meets requirements of ASTM / NACE Standard TM0284 and suitable to test material as per requirements of NACE MR0175.

Hydrogen induced cracking test apparatus is rectangular provided with ready to use connections fittings. HIC test apparatus is supplied with essential spares for uninterrupted long term testing. These specimen are machined with thickness of 5-30 mm, width 20 mm, and length of 100 mm is suitable for testing as per the NACE Standard. Hydrogen induced cracking test instrument is supplied with standard size of 12” (L) x 12” (W) x 9” (H). It is provided with specially made rack to keep the samples with minimum surface contact and all the specimens can be viewed during the test period easily.

HIC test apparatus is suitable for standard environment chamber is machined from clear, durable perspect / acrylic to permit instant visual observation of the specimen at all times. Glass with acrylic is also available at option of user. O-ring seals are provided to prevent any leakages from test apparatus. Individual test apparatus are tested with Hydro Test of Air before dispatch. Each HIC testing apparatus has one inlet, one outlet and one plug to remove test solution or conduct potassium idometric test as per the standard to verify concentration of test solution.

What is hydrogen induced cracking? Refer NACE Standard TM0284

All the test apparatuses are manufactured to provide interchangeable connections and fittings. It complies with requirements of TM0284. Purpose of HIC test procedure is to study hydrogen induced cracking mechanism. HIC test apparatus is suitable to use NACE TM0284 specified Solution A or Solution B. Solution A is acidified brine. Solution B is simulated seawater prepared in accordance with ASTM D1141. In either case, H₂S is bubbled through the solution constantly throughout the test period. NACE TM0284 specifies test duration of 96 hours. The test requires evaluation of pH values of the test solution before exposure and after the exposure. HIC test specimens are cut into sections and examined under a microscope for hydrogen-induced corrosion cracks. The dimensions of any such cracks are recorded and used to compute the values in percentage for Crack Length Ratio (CLR), Crack Thickness Ratio (CTR) and Crack Sensitivity Ratio (CSR) as per the NACE Standard. We are also able to provide spares, HIC test procedures of all the items within shortest time.

Hydrogen induced cracking corrosion testing (HIC Test) can be made easy by using Caltech's HIC Testing Apparatus.

Our company offers high temperature indentation bath, which is highly useful for testing of coating material at above ambient temperature up to 90^o C. A uniform temperature is maintained in the bath that is measured by electronic display on the control panel. Timer can be set to the required time to continuously run the test. Testing can be carried out for single or multiple samples up to 6 nos. Our range of instruments is manufactured to meet the requirement of DIN 30670 standard of coating inspection.

Caltech Engineering Services manufactures and exports salt highly efficient spray testing instrument. Salt spray test is also called as Fog Test. This is an accelerated environmental corrosion test in which metal specimens are exposed either continuously or intermittently to a fine mist of salt-water solution used to evaluate the resistance to corrosion of paints, coatings, or electrical connections. The appearance of corrosion products (oxides) is evaluated after a period of time. Test duration depends on the corrosion resistance of the coating. Therefore, the more corrosion resistant the coating is, the longer the period in testing without showing signs of corrosion.

In the salt spray test cabinet painted/coated panels, automobile components i.e. Electro-plated, Painted, and Anodized etc are exposed to a mist of salt over a period of test duration. Saturated air produced by spraying common salt solution into an enclosed cabinet creates humid atmosphere up to 98%. The articles being positioned for this accelerated corrosion test in such a way that they are exposed to the hot mist produced in the chamber, through the controlled air and liquid nozzles. The instrument is suitable for testing as per IS /BS / ASTM standards. Testing is carried out at 35^o C or even up to 50^o C.

Typical coatings that can be evaluated with this method are:

Hot-dip galvanized steel, Phosphated surfaces, zinc and zinc-alloy plating, electroplating or electroplated materials of chromium, nickel, copper, tin alloys. Coatings that are not applied electrolytically are zinc flake coatings acc. to ISO 10683 and organic coatings.

The instrument is supplied in two sizes

• 915 × 510 × 310 mm
• 450 × 250 × 250 mm

Any other size can be supplied as per customer need.

The Apparatus Consists of

• Acrylic mist chamber w/ Dome roof
• Heater
• Temperature Indicator & Controller
• Time Tantalizer
• Atomizing Nozzle For Mist Formation
• Specimen Supporter

Spares required

• Air Compressor

• Humidity / Thermo-Hygro Meter

   

   

   

   

   

   

Our company manufactures and supplies proof ring to test and accurately determine the resistance to sulfide stress corrosion cracking (SSC) and stress corrosion cracking of metals in H₂S environment or service. Proof rings and associated accessories are manufactured to meet requirements of NACE TM0177 and material standard requirements as per MR 0175. Leading laboratories with best H₂S testing capabilities use our range of instruments. This complete range of corrosion testing instruments provides assistance to prevent corrosion and control corrosion in oil & gas, sour gas production, offshore, gas treating plants and petroleum refineries.

For more details refer to the attached pdf file