... the synergistic influence of combining the chemical and mechanical techniques. A discussion on the development of ultrasonic chemical cleaning blends is presented. A consideration on the requirement for oxidative corrosion control is also conferred. Finally, an examination of variances observed...

... products on a large and inhomogeneous surface. In this project, nitric acid immersion was evaluated as a chemical cleaning technique to remove corrosion products from aluminum 6101 foams (UNS A96101) with different pore sizes and surface areas and were subjected to exposure in simulated seawater (3.5 wt...

... environmental and health issues when the exchanger unit is pulled from the column. Here, the benefits and limitations of mechanical steam out and high-pressure water blasting (HPWB) versus vapour phase chemical cleaning of these units is discussed. Refinery Upgrader Distillation Crude Oil Chemical Cleaning...

...Abstract Chemical cleaning of industrial process equipment can result in corrosion of carbon and low alloy components. Predicting and monitoring of such corrosion is a critical aspect of the overall chemical cleaning project. Normally, laboratory qualification testing is performed to establish...

... million, extensive preparations, and a plant outage extension ranging from a few days up to about two weeks depending on the process specifics. Partial (“Soft”) Chemical Cleaning: Advanced Scale Conditioning Agent (ASCA) Application The development of HCC in the 1980s provided a method for restoring...

... usually resulted in more efficient as well as less wasteful process that benefited people, the environment as well as the companies' bottom line. chemical cleaning environment safety health solvents inhibitors INTRODUCTION Industrial chemical cleaning developed as an offshoot of technology devised...

... tested which offer a non-toxic, low toxicity or green chemical profile. These were tested against several common organic acids used in industrial chemical cleaning, at a variety of temperatures and compared against the current top ranked organic acid inhibitor from our lab. Testing showed trends...

... by applying the simple organic, oxalic acid, to target dissolution of the primary deposit constituents of iron and copper oxides using slight variations in chemistry and application methodology. H. B. Robinson Nuclear Plant Unit 2 (RNP) was chemically cleaned using the oxalic acid cleaning solutions process...

...). The site is currently in the process of removing the waste from these tanks in order to place it into vitrified, stable state for longer term storage. The last stage in the removal sequence is a chemical cleaning step that breaks up and dissolves metal oxide solids that cannot be easily pumped out...

... of surfactant. Abstract Acid washing is a commonly employed method in the chemical cleaning. There are many factors to consider prior to adding acid to a given system. For example, corrosion of the base materials, downtime of the system, and the economic cost of completing the job. None of these factors can...

... of novel chemical cleaning solutions for industrial purposes. Acid corrosion inhibitors are an absolute necessity when it comes to the chemical cleaning of heat exchangers and boilers made from materials such as carbon steel, and iron alloys. Scales and deposits are treated with strong acids, which may...

... in the removal sequence is a chemical cleaning step that breaks up and dissolves metal oxide solids that cannot be easily pumped out of the tank. Oxalic acid has been selected for this purpose because it is an effective chelating agent for the solids and is not as corrosive as other acids. Electrochemical...

...Performance In a chemical cleaning design, it is vital to have a system that operates at the optimal performance while being time and cost effective. Utilities require a timely, cost-effective system due to the extensiveness of the process and the fact that the nuclear power plant is shut down...

.... The six criteria pollutants covered by the Act are as follows: abstract In order to comply with federal and local regulations for air quality, utilities opting to chemically clean their steam generators will be required to estimate their gaseous chemical emissions. Because most chemical cleaning solvents...

... in the SGs (e.g., upper bundle flush and sludge lancing), mechanical methods are not always effective in targeting the critical inventory locations. Deposit buildup and corrosion as a result of the sludge accumulation will typically require a more aggressive removal technique (e.g., chemical cleaning...

...chemical cleaning hydrocarbon foulant hydrocarbon deposits test procedure INTRODUCTION Safety in any operation is paramount. This includes, but is not limited to, chemical handling and storage procedures, mixing, monitoring and application operations, waste handling, storage and disposal...

... pump modifications filtration corrosion fouling underdeposit corrosion fatigue odors glycol brine chemical cleaning biocides vapor phase corrosion inhibitors INTRODUCTION Industry has always been concerned with improving reliability of process equipment and avoiding unscheduled production...

...Abstract The approach to the commissioning of a HRSG in the industry has varied from project to project. One school of thought contends that no chemical cleaning (or minimal) is required. The second school of thought contends that a complete chemical cleaning is required. This report discusses...

...Abstract Since 1998, a number of steam generator chemical cleanings have been performed in North America and worldwide with the objective reducing the corrosive impact of steam generator secondary side deposits on the steam generator tubes and to improve the heat transfer performance of the steam...

... operations: Alkaline detergent cleaning to remove oil and grease; and Ammoniated citric acid cleaning to remove mill scale and corrosion products. Alkaline Detergent Cleaning The procedure for alkaline detergent cleaning follows: Abstract This paper discusses the reasons for chemically cleaning a boiler...