AMPP Store - Products tagged with 'residual'

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51317-9466- Inhibitor Partitioning Efficiency Using Fluorescence Spectroscopy Detection

Product Number: 51317-9466-SG

ISBN: 9466 2017 CP

Author: Jody Hoshowski / Rolando Perez-Pineiro / Alyn Jenkins / Diansy Cruz-Perez

Publication Date: 2017

$20.00

An analytical method using fluorescence spectroscopy has been developed to measure inhibitor concentration. It enables dye transfer methods and promises a greater degree of accuracy. The procedure can be performed in the laboratory or at the well site, and individual analysis can be done quickly.

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Effect of Residual Copper, Nickel, and Chromium on the Corrosion Resistance of Carbon Steel in Hydrofluoric Acid Alkylation Services

Product Number: 51393-93623-SG

Author: H.H. Hashim, W.L. Valerioti,

Publication Date: 1993

$20.00

Carbon steel is the main construction material in HYDROFLUORIC ACID (HF) alkylation units. Carbon Steel has good corrosion resistance to anhydrous HF (AHF) below 160 degrees fahrenheit (71 C). The corrosion resistance is due to the formation of an inorganic iron fluoride scale on the carbon steel surface that protects the steel from futher corrosion. The presence of an adherent and continuous scale is essential in keeping the corrosion rate at a minimum.

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Electrochemical Corrosion Behavior of Carbon Steel With and Without Residual Elements

Product Number: 51320-14245-SG

Author: Suresh Divi, Sri Krishna Chimbli

Publication Date: 2020

$20.00

Residual elements (RE) in carbon steel, not specifically included in the specified steel, appear to influence the corrosion rate under certain conditions, especially in services involving hydrofluoric acid (HF). The relative proportions of RE, specifically %C, %Ni, %Cu, and %Cr in carbon steel base and weld metals used in refineries, especially in alkylation processes with HF as the catalyst, significantly impact corrosion behavior. Studies described in the literature show corrosion damage with high RE (Cu + Ni + Cr >0.20) components as compared to low RE (Cu + Ni + Cr <0.20) components.

In this study, electrochemical corrosion testing was performed on a 3-inch pipe elbow section with high REs that had developed a through-wall leak in service. Test results were compared to those obtained on a similar pipe elbow section with lower REs. The samples were exposed to 50% HF at room temperature and at 65°C. Linear polarization resistance (LPR) corrosion rates were measured at both temperatures. Potentiodynamic (PD) polarization scans were performed on samples of low and high RE steel exposed to 50% HF at room temperature.

Test results indicated that LPR corrosion rates were higher for the high RE carbon steel samples than for low RE carbon steel samples at both temperatures. PD scans showed that the critical current densities were higher for high RE steel than for low RE steel.

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Residual Dye (Lubricant) on Galvanized Fasteners - How Much is Too Much?

Product Number: 51217-055-SG

Author: Carly McGee, Daniel G. Chasky, Steven M. Duke

Publication Date: 2017

$20.00

The nuts of galvanized fasteners used on bridges are coated with a wax-based lubricant that contains a dye. Once installed, the fasteners are cleaned to remove the wax prior to painting. Cleaning is typically accomplished using a combination of solvents and hand tools, but questions are often raised as to how much residual dye on the surface is acceptable for painting.

Products tagged with 'residual'

51317-9466- Inhibitor Partitioning Efficiency Using Fluorescence Spectroscopy Detection

Effect of Residual Copper, Nickel, and Chromium on the Corrosion Resistance of Carbon Steel in Hydrofluoric Acid Alkylation Services

Electrochemical Corrosion Behavior of Carbon Steel With and Without Residual Elements

Residual Dye (Lubricant) on Galvanized Fasteners - How Much is Too Much?

Association for Materials Protection and Performance