反渗透（RO）和纳滤（NF）等扩散控制膜工艺被认为是产生腐蚀性成品水的水处理工艺。这些工艺以及与常规RO和NF处理系统相关的处理工艺通常会去除过多的钙和碱度，以提供缓冲且易于稳定的成品水。微滤（MF）和超滤（UF）工艺不会产生腐蚀性水，因为它们不会去除任何溶解的碱度或钙，因此不会直接影响成品水的缓冲或稳定。 然而，对于常规生产的反渗透成品水，碳酸钙的稳定pH值pHs通常高于9，碳酸盐碱度通常低于20 mg/L（CaCO3）。扩散控制膜工艺的碱度损失可以通过对传统膜工艺的改进来控制。本文描述了佛罗里达州皮内拉斯县改进膜法和常规地下水处理工艺对铅、铜和镀锌钢腐蚀速率的现场调查。

Diffusion controlled membrane processes such as reverse osmosis (RO) and nanofiltration (NF) have been considered as water treatment processes that produced corrosive finished waters. These processes and the treatment processes associated with conventional RO and NF treatment systems typically remove too much calcium and alkalinity to provide a buffered and easily stabilized finished water. Microfiltration (MF) and ultrafiltration (UF) processes do not produce corrosive waters because they do not remove any dissolved alkalinity or calcium and therefore do not directly affect the finished water buffering or stabilization. However the stabilization pH with respect to calcium carbonate, pHs, is usually above 9 and carbonate alkalinities are typically less than 20 mg/L as CaCO3 for conventionally produced RO finished waters. The loss of alkalinity from diffusion controlled membrane processes can be controlled by a modification of the conventional membrane process. This paper describes a field investigation of lead, copper and galvanized steel corrosion rates from a modified membrane process and a conventional groundwater treatment process at Pinellas County Florida.