When considering material selection and sintering for drill bits applications, specifically in the petrochemical industry, many variables must be considered; we can consider tensile strength, fatigue resistance, hardness, modulus of elasticity, toughness, fracture resistance, expansion coefficient, among others. In a general sense, the bits used to drill bits oil or gas wells at the tip is the auger that removes the material. These drill bits can be, among other options, fixed cut bits also known as drag bits commercially called polycrystalline compact diamond (PDC). These have built-in cutters that rotate together. This type of drill bits cuts soft formations into a ploughshare, gouging or indenting the ground. Modern fixed-cut drills with surface diamond (PDC) bits cut rock similar to a lathe. Their superior abrasion resistance is seen as the main contributor to the greatly improved drilling efficiency and economy [
1]. Another type of drill bit is a rotary taper bit, which has metal cones that rotate independently as the drill rotates. Each cone has cutting structures (wear-resistant steel teeth or TCI tungsten carbide inserts) that cut and grind, or plunge and break, much like chisels or spades, depending on the hardness of the formation [
2]. Together types of drill bits at the time of working the components are not only subject to wear processes, but are also in contact with chemically aggressive environments, corrosion can play an important role in the degradation of the surface and can significantly accelerate wear [
3]. Furthermore, despite their extensive use and excellent abrasion resistance, PDC tools are still very susceptible to fractures [
4,
5,
6,
7,
8,
9]. This is why the development of the wearing surface of PDC and TCI bits is one of the most crucial problems in the drilling industries due to the excessive costs that can result due to an improper choice (or design) of the cutting tool [
10]. This is mainly a result of their relatively low fracture toughness [
1] and because bit wear is considered an intrinsic cost, achievable Significant savings through effective control and minimization of bit wear [
11]. Therefore Development of the wear surface of the PDC bits is one of the most crucial problems in the drilling industries on account of the excessive costs which may result due to an inappropriate choice (or design) of the cutting tool [
10]. Finally, although there are various wear studies for the PDC drill bits and for the TCI uncertainties, there is no information on their corrosion behavior [
4,
5,
6,
7,
8,
9,
11]. For this reason, the objective of this research is determining the relation between microhardness and abrasion wear on two bodies through the pin or disc test. As well as to determine the wear mechanism by taking SEM electron microscope micrographs after the wear test and comparing with studies where they simulate the conditions of use of these drill bits. Also, determine the corrosion behavior, using the polarization curves. One of the reasons for carrying out the corrosion test is based on what has been stated by Human et al. [
3], who reports that there is a considerable amount of research on the corrosion of cemented carbides, but these have been limited to a large extent to comparisons of corrosion rates in different solutions using measures of weight loss. also there have been a few studies aimed at understanding the processes involved and all of them have made use of electrochemical measurements. However Satisfactory explanations of the corrosion mechanisms that occur are lacking. The relationship between microstructural parameters and corrosion is unclear and researchers have reported very high experimental variations, making comparisons between grades of different tungsten carbide grain sizes and binder content inconclusive. Another reason is mentioned by Zeng et al. [
12], comment that with the exploitation of oil and gas in high-quality oil fields entering the middle and late stages, the higher content of water and Cl- in the produced water, as well as the high partial pressure of corrosive gases such as CO2 and H2S in transmission pipeline lead to extremely severe corrosion damage, resulting in thinning of the walls and even perforation of the pipelines, causing huge economic losses and serious environmental pollution. Besides, no reports of taffel curves were found for the PDI inserts and a comparison between these two was desired. Finally, a paragraph is made on the selection of materials for the use of drill bits in order that future investigations have information on what are the characteristics that must be had when selecting materials for these applications, one of these materials are Diamon Like Carbon or DLC coatings on tool steels that have good mechanical properties [
13,
14,
15,
16] and which decrease production costs compared to the costs of PCI and TCI.