Research Current Situation and Trends of Black Passivation Process for Galvanized Coating

2010 ◽  
Vol 154-155 ◽  
pp. 597-601
Author(s):  
Shao Dui Shi ◽  
Yun Ying Fan ◽  
Ye Hua Jiang ◽  
Zu Lai Li
Keyword(s):  
Feasibility Study ◽  
Current Situation ◽  
Passivation Process ◽  
Zinc Plating ◽  
Galvanized Coating

This paper mainly introduces present research on the black passivation process of galvanized coating and its application. Additinally, a feasibility study on black chromium-free passivation technology for Zinc plating coating has also been discussed.

A feasibility study of municipal solid waste incineration fly ash utilisation in Estonia

2017 ◽  
Vol 35 (9) ◽  
pp. 904-912 ◽  
Author(s):  
Hakan Berber ◽  
Ruedi Frey ◽  
Viktoria Voronova ◽  
Arina Koroljova
Keyword(s):  
Environmental Management ◽  
Fly Ash ◽  
Municipal Solid Waste ◽  
Solid Waste ◽  
Feasibility Study ◽  
Current Situation ◽  
Environmental Benefits ◽  
Management Options ◽  
Carbonation Process ◽  
Msw Incineration

The purpose of this paper is to discuss the alternative environmental management options for the utilisation of municipal solid waste (MSW) incineration fly ash (FA), which is generated at Iru Power Plant where MSW is incinerated in Estonia. To determine sustainable and economically feasible environmental management options for MSW incineration FA in Estonia, CO2 sequestration with a further carbonation process was examined. A partial Cost & Benefit Analysis has been conducted to compare the carbonation process to the current situation. Two carbonation options were developed. Option 1 is to use carbonated FA in any other processes based on the waste-to-product principle. Option 2 is to send carbonated FA to the non-hazardous landfill in Tallinn, Estonia. Important parameters, such as Net Present Value (NPV), Internal Rate of Return (IRR), Benefit–Cost Ratio (BCR) and Break Even Point (BEP), have been calculated for carbonation options and the current case. In addition, a sensitivity analysis has been conducted to examine its robustness. The results showed that the best option is carbonation Option 1 with NPV of 9,209,662 EUR, IRR of 43%, BCR of 2.63 and BEP between 2018 and 2019. Both Options 1 and 2 constitute more sustainable and environmentally friendly management options compared to the current situation. It can be concluded that this preliminary feasibility study showed that running a carbonation plant may be profitable and sustainable for Estonia. Currently, there is no treatment technology for MSW incineration FA in Estonia and FA is sent to a neighbouring country for further utilisation. This is the first study to demonstrate FA management options with economic and environmental benefits.

Feasibility Study of Distributed Roof Photovoltaic Generation Technology Applications in Shanghai

2014 ◽  
Vol 672-674 ◽  
pp. 61-65
Author(s):  
Qun Yin Gu ◽  
Xiao Ying Li ◽  
Li Yi Li ◽  
Cui Yu Wu ◽  
Nai Hong Shu
Keyword(s):  
Feasibility Study ◽  
Payback Period ◽  
Current Situation ◽  
Economic Feasibility ◽  
Feasibility Analysis ◽  
Rate Of Return ◽  
Internal Rate Of Return ◽  
Photovoltaic Generation ◽  
Technology Applications ◽  
Generation Technology

The current situation, domestic supportive policies and problems of photovoltaic generation technology are analyzed. According to the roof resources and solar illumination conditions in Shanghai, feasibility analysis of distributed roof photovoltaic generation technology is presented in angle of economic feasibility. The influence of generation price subsidies on the internal rate of return and payback period is obtained and finally raising advices to improve domestic photovoltaic generation technology.

Influence of bath temperature on zinc plating and passivation process

2013 ◽  
Vol 29 (3) ◽  
pp. 234-239 ◽  
Author(s):  
Y D Yu ◽  
G Y Wei ◽  
J W Lou ◽  
H L Ge ◽  
L X Sun ◽  
...  
Keyword(s):  
Bath Temperature ◽  
Passivation Process ◽  
Zinc Plating

Enhancing adhesion and anti-corrosion performance of hot-dip galvanized steels by sandblasting/phosphating co-treatment

2021 ◽  
Author(s):  
Jingwen Zhang ◽  
Gang Kong ◽  
Wenjun Wang ◽  
Shuanghong Zhang ◽  
Chunshan Che
Keyword(s):  
Corrosion Resistance ◽  
Steel Structures ◽  
Corrosion Damage ◽  
Organic Coating ◽  
Grit Blasting ◽  
Duplex Coating ◽  
Galvanized Steels ◽  
Zinc Plating ◽  
Long Time ◽  
Galvanized Coating

Abstract The substations outdoor steel structures employed in aggressive marine environments can accelerate corrosion damage and cause incredible degradation of performance. Hot-dip galvanizing and organic coating dual-coated anticorrosion system is currently the most effective and efficient protection strategy. In present paper, sandblasting and phosphating technique were applied to the surface of zinc plating, the effect of various grit-blasting and phosphating technology conditions on the adhesion performance and corrosion resistance of duplex-coated system were systematically investigated. Results revealed that the bonding strength of the duplex coating after grit-blasting and phosphating pretreatment was 3.25 and 2.71 times higher than that of the untreated, respectively. In particular, sandblasting and phosphating coprocessing of duplex coating could furtherly improve the adhesion behavior and corrosion resistance, which mainly due to their synergistic effect. Sandblasting can rough the surface of galvanized coating and generate many pits and scratches. Thus, phosphating can form more needle-like zinc phosphate crystals in those positions, anchoring and pinning firmly the interface between galvanized coating and organic coating. Meanwhile, the phosphating film still acted as an anti-corrosion physical barrier to hinder the intrusion of corrosive medium and protect galvanized steels from storage rust before painting for a long time.

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