Prevention of Corrosion of Cast Iron Water Mains

背景：威尔士水务公司是威尔士第四大公司，为140万家庭和企业提供清洁饮用水。英格兰和威尔士水务公司的一个独特之处在于，我们是一个非营利组织。我们每天通过26，500公里的水管供应约8.3亿升的水，其中11，400公里由铸铁制成。研究背景：由于供应的沃茨大多是软的，威尔士水遭受铸铁水管的内部腐蚀。腐蚀表现在供应给我们客户的水变色。2050愿景组织的一部分是确保所有客户都能获得无变色的水，因此，这一问题是公司的一个关键研究领域。项目描述：该项目的目的是研究如何使用流通电池防止腐蚀。这将使我们能够了解真实的生活条件和各种化学品作为腐蚀抑制剂的效果。我们还想了解外加磁场的影响，以及这是否能充分改变水的化学性质，将腐蚀产物氧化为磁铁矿。期望的结果：-了解缓蚀剂在流通池中的作用;-调查外加磁场的影响;以及-了解在已腐蚀的干线的配电网络中应用缓蚀剂的成本效益。

Background:Welsh Water are the 4th largest company in Wales supplying 1.4 million homes and businesses with clean drinking water. A unique trait among the Water Companies in England and Wales is the fact that we are a not-for-profit organisation. We supply around 830 million litres of water every day through 26,500km of water mains, of which 11,400 are made from cast iron.Research Context:As waters supplied are mostly soft, Welsh Water suffers with internal corrosion of cast iron mains. The corrosion manifests in discoloured water being supplied to our customers. Part of the organisations 2050 Vision is to ensure that all customers are supplied with water free from discolouration; therefore, this issue is a key research area for the company.Project Description:The aim of the project is to investigate how we can prevent corrosion, using a flow through cell. This will enable us to understand real life conditions and the effect of various chemicals as corrosion inhibitors. We would also like to understand the influence of an applied magnetic field and whether this can alter the water chemistry sufficiently to oxidise corrosion products to magnetite.Desired outcomes:- Understand the role of corrosion inhibitors in a flow through cell;- Investigate the effects of applied magnetic fields; and- Understand the cost benefit of applying corrosion inhibitors within the distribution network with mains that are already corroded.