Hydrogen sulfide (H2S) gas can be harmful to cement in several ways. When cement is exposed to H2S gas, it can cause the cement to deteriorate and become weakened. This can lead to cracks, spalling, and other forms of damage that can weaken the structure and reduce its lifespan.

One reason H2S is harmful to cement is that it can react with the calcium hydroxide in the cement to form gypsum, which is a soft mineral that can weaken the cement matrix. H2S can also react with the silicate minerals in cement to form sulfates, which can expand and cause the cement to crack and spall.

In addition to these chemical reactions, H2S can also corrode steel reinforcements in concrete structures, which can lead to further damage and weaken the structure.

Overall, H2S gas can be harmful to cement and can cause significant damage to concrete structures if it is not properly controlled. It is important to take steps to prevent the ingress of H2S into concrete structures and to mitigate the effects of H2S on cement if it is present.

Microbial induced corrosion (MIC) is a type of corrosion that is caused by the presence of microorganisms, such as bacteria or fungi, on metal surfaces. MIC can cause significant damage to metal structures and is a common problem in a variety of industries, including oil and gas, water treatment, and marine environments.

There are several ways to prevent microbial induced corrosion:

1. Use corrosion-resistant materials: Choosing corrosion-resistant materials, such as stainless steel or certain types of plastic, can help to reduce the risk of MIC.
2. Keep surfaces clean and dry: Maintaining clean and dry surfaces can help to reduce the risk of MIC, as microorganisms need water and nutrients to survive and grow.
3. Use biocides: Biocides are chemical agents that kill or inhibit the growth of microorganisms. Using biocides on metal surfaces can help to prevent MIC.
4. Apply coatings: Applying protective coatings to metal surfaces can help to create a barrier between the metal and the environment, which can help to prevent MIC.
5. Control water and moisture: Controlling water and moisture levels can help to reduce the risk of MIC, as microorganisms need water to survive and grow.
6. Monitor and control pH: Maintaining the correct pH level can help to prevent MIC, as certain pH levels can be more conducive to corrosion.

Overall, preventing microbial induced corrosion requires a combination of good design, proper material selection, proper maintenance, and effective corrosion control measures.

There are several reasons why you might consider fortifying your cement with an anti-bacterial additive:

1. To prevent microbial induced corrosion: As mentioned previously, microbial induced corrosion (MIC) is a type of corrosion that is caused by the presence of microorganisms on metal surfaces. Adding an anti-bacterial additive to cement can help to prevent MIC by inhibiting the growth of microorganisms on metal surfaces.
2. To improve the hygiene of surfaces: Cement surfaces that are prone to the growth of microorganisms, such as those in food processing facilities or hospitals, can benefit from the addition of an anti-bacterial additive. This can help to improve the overall hygiene of the surfaces and reduce the risk of cross-contamination.
3. To reduce the risk of mold growth: Certain types of cement additives can help to reduce the risk of mold growth on cement surfaces. This can be particularly important in damp or humid environments where mold is more likely to grow.
4. To improve the durability of cement surfaces: The presence of microorganisms can weaken cement surfaces and reduce their lifespan. By inhibiting the growth of microorganisms, an anti-bacterial additive can help to improve the durability of cement surfaces.

Overall, fortifying cement with an anti-bacterial additive can offer a variety of benefits, including improved hygiene, reduced risk of microbial induced corrosion, and improved durability. It is important to carefully consider the specific needs of your application and choose an appropriate anti-bacterial additive to suit your needs.