Server maintenance is scheduled for Saturday, December 21st between 6am-10am CST.

During that time, parts of our website will be affected until maintenance is completed. Thank you for your patience.

Menu
Search
Filters
Close
Menu

Corrosion Behavior Of Stainless Steel Food Processing Equipment In Low Ph Environments

Picture for Corrosion Behavior Of Stainless Steel Food Processing Equipment In Low Ph Environments
Available for download

Food consists mainly of proteins, carbohydrates, and fats. Processed foods contain diverse aqueous solutions, syrups, and additives, used to improve food appearance, taste, quality and preservation. They have a wide pH range, components such as, salt, water, and vinegar impact food corrosivity.

Product Number: 51322-17783-SG
Author: Suresh Divi, Harbinder Pordal
Publication Date: 2022
Industries: Corrosion Monitoring and Control , Coatings
$0.00
$20.00
$20.00

The food industry uses various corrosion resistant alloys (CRA’s) in the form of vessels, piping, mixers, etc. to process different types of foods. The physicochemical characteristics of processed foods permit various CRA grades depending on the type of food contents and its corrosivity (non-corrosive, mild, medium, and high corrosivity). Due to ease of availability and low cost 304 stainless steel (UNS S30400) is the most commonly used CRA in the food industry. If proper heat treatment is not performed on the 304 stainless steel food processing components, when subjected to low pH corrosive environments, the welds and heat affected zone (HAZ) show poor corrosion resistance.

In this study, the corrosion resistance of 304 stainless steel weld metal in low pH environments, involving a high viscosity, low pH (3.6) “food product” and lime juice was investigated via electrochemical corrosion tests. A series of electrochemical linear polarization resistance (LPR) corrosion rate measurements of sensitized 304 weld and non-sensitized 304 and 316 stainless steel welds in the above-mentioned environments are performed at room temperature and 40°C to determine the general corrosion behavior and pitting corrosion resistance. Metallographic examination and scanning electron microscopy (SEM) examination of the tested welds were performed. Sensitized areas of 304 stainless steel showed higher corrosion rates and poor pitting resistance. The study demonstrated that a non-sensitized weld of food processing equipment is very important to prevent corrosion in low pH foods.

The food industry uses various corrosion resistant alloys (CRA’s) in the form of vessels, piping, mixers, etc. to process different types of foods. The physicochemical characteristics of processed foods permit various CRA grades depending on the type of food contents and its corrosivity (non-corrosive, mild, medium, and high corrosivity). Due to ease of availability and low cost 304 stainless steel (UNS S30400) is the most commonly used CRA in the food industry. If proper heat treatment is not performed on the 304 stainless steel food processing components, when subjected to low pH corrosive environments, the welds and heat affected zone (HAZ) show poor corrosion resistance.

In this study, the corrosion resistance of 304 stainless steel weld metal in low pH environments, involving a high viscosity, low pH (3.6) “food product” and lime juice was investigated via electrochemical corrosion tests. A series of electrochemical linear polarization resistance (LPR) corrosion rate measurements of sensitized 304 weld and non-sensitized 304 and 316 stainless steel welds in the above-mentioned environments are performed at room temperature and 40°C to determine the general corrosion behavior and pitting corrosion resistance. Metallographic examination and scanning electron microscopy (SEM) examination of the tested welds were performed. Sensitized areas of 304 stainless steel showed higher corrosion rates and poor pitting resistance. The study demonstrated that a non-sensitized weld of food processing equipment is very important to prevent corrosion in low pH foods.

Product tags
Also Purchased
Picture for Corrosion Control In Water Injection Pipelines
Available for download

Corrosion Control In Water Injection Pipelines

Product Number: 51322-17692-SG
Author: Jonathan Marsh
Publication Date: 2022
$20.00

Dubai Petroleum (the Operator) operates five offshore oil fields in the Emirate of Dubai (Fateh, South West Fateh, Falah, Jallilah and Rashid), in addition to various onshore gas production, storage, distribution and import facilities, and LNG import facilities. The assets within these offshore fields consist of approximately 80 platforms of various sizes, comprising central bridge linked processing facilities in Fateh and South West Fateh, and outlying normally unmanned wellhead production platforms. These platforms are linked by a network of over 150 subsea pipelines, of which over 30 are presently operational sea water injection pipelines.
Picture for Corrosion And Stress Corrosion Cracking Behavior Of Super 13Cr Martensite Stainless Steel In CO2-Saturated High Temperature And High Pressure (HT/HP) Downhole Environments
Available for download

Corrosion And Stress Corrosion Cracking Behavior Of Super 13Cr Martensite Stainless Steel In CO2-Saturated High Temperature And High Pressure (HT/HP) Downhole Environments

Product Number: 51322-17559-SG
Author: Zezhou Wen, Richard Barker, Jiong Qian, Anne Neville, Qiang Zhong, Yong Hua, Chun Wang
Publication Date: 2022
$20.00

Corrosion is one of the major issues in oil and gas production, as well as geothermal energy due to the aggressive environments, such as high temperatures and pressures.1, 2 Material selection for downhole tubing is therefore paramount importance to ensure well integrity. Thus, the selected materials must be corrosion resistant, cost-effective, reliable, and have the required strength for such arduous conditions.
Picture for Corrosion Condition Assessment Program For Marine Asset Management
Available for download

Corrosion Condition Assessment Program For Marine Asset Management

Product Number: 51322-17750-SG
Author: Jeffrey S. West, Casey Jones, Stephen W. Foster
Publication Date: 2022
$20.00

This paper describes the development of a formal corrosion inspection and condition assessment program to support corrosion and asset management planning for maritime structures at Port Houston. A hierarchical, elemental-based inspection approach was developed using visual inspection criteria and prescribed measurements to characterize the condition of coatings and cathodic protection systems for above- and underwater elements in maritime structures.  
Categories
Industry
Recently viewed
Popular tags
View all

Association for Materials Protection and Performance

© AMPP All Rights Reserved.
Membership Terms of Content Use
Contact Customer Support